Trouble checking blind spot while driving?

I am a new driving (yes, a teen driver).

I had several months of lesson and just got my license. I've driven by myself twice.



I hope it's because of my lack of experience....





BUT. whenever i do check over my right shoulder in order to change lanes...



i can't differentiate how far away the car on the right is from mine?



FOR EXAMPLE

today, i was changing lanes to the right.



i checked over my right shoulder. I saw the car, but thought i had a fair amount of space. but when i did change the lanes, the car started to honk at me and I apparently cut that person off.



Also, whenever I drive, i just have trouble changing lanes because whenever i look over the shoulder... i just don't see/ can't see the car or the distance / gap there is. I don't know.



well, it was at night... so maybe that's why?



But seriously, even in day, whenever I drive and try to change lanes, I look over the shoulder, but i just can't seem to grasp the distance between the car behind me and my car.



Is it because I'm short? (hah) or just that my mind can't seem to process it will?



Also, even if i try, i just can't seem to concentrate whenever i drive. I feel a bit lightheaded... dizzy?Trouble checking blind spot while driving?
The first step is to adjust the rear-view mirror to do exactly that - give you a view directly to the rear. Position it so that it best covers your view straight out the rear window. Don't bother tilting it to one side or the other to assist with your view of traffic to either side of your car. That's what the side mirrors are for.



Next, lean your head until it almost touches the driver's side window. Then, adjust your left side mirrors so that you can just barely see the side of your car, and no more than that.



Lean your head to the right towards the middle of the car and adjust the right side mirror so that you can just barely see the right side of your car. You should NOT be able to see the side of your car when your head is perfectly upright.



Check for blind spots by doing the following: While driving along a four-lane road in the right lane, note a vehicle in the left lane coming up to pass you from behind. Without moving your head, glance in the rear-view mirror and follow it as it approaches your car in the left lane.



Just before it disappears from your view in the rear-view mirror, glance to the left side mirror. There it is. Now follow that vehicle in the side mirror as it begins to pass you. Then, just before it disappears from the side mirror, you should see it with your peripheral vision.



Notice that without even turning your head, you never had a blind-spot. Then try it with the right side mirror. Watch as you pass a vehicle travelling in the right lane go from your peripheral vision, to your right side mirror, to your rear-view mirror.



Again, no blind-spot. If there is a blind spot for even a fraction of a second, your side mirror adjustment needs some fine-tuning...................Trouble checking blind spot while driving?
It's not that complicated.



If you have to check to see if they're in your blind spot, they're close to your car.



If you can see them in your mirror, they're further back.



If there's a doubt, just wait until you're sure of the distance.



It's really not that hard........



And being short has nothing to do with it. Adjust the seat so you can see properly. All modern cars are designed to accommodate the normal range of human height. So unless you're a dwarf, you shouldn't have a problem.
It is probable that when you look over your shoulder you are looking with one eye only so 3-D vision is not in effect. Why don't you use the side view mirrors for rear vision? This would seem the safer option.
To gauge distance, use the two headlight rule: If you can see both headlights in your mirror, you should have enough room to merge. Unless they are speeding up quickly this will give you lots of room. If, when you do your shoulder check, you see a car in the next lane that you could not see in your mirrors, they are too close and you should not merge.
If you can see the car over your shoulder , then you must not merge out.If in doubt, do nowt, as the saying goes.Why not take the Pass Plus course( if you are in UK) which will improve any areas that you find difficult.The dizziness is caused by the stress you feel.Try to relax and think about what you are doing .Plan well ahead and always know whats behind you , so that when you want to change lanes ,you know whether you can well in advance rather than take a risk at the last minute.If you plan well in advance of any change of lanes you will feel better ,and the adrenalin rush that causes your dizzyness will go away, because you will know that you are not taking dangerous risks.
You need practice. I had the exact same problem as you, and I can now change lanes by myself. Move your mirrors so you don't have to turn your head so often, and practice looking in the mirror and seeing how far away things are. Good luck!