Pressure strain symptoms and conditions

I am 20 and have been on Wellbutrin XL for the past 3 months but two weeks ago my doc increased my dose to the max which is 450mg. Since then my life has been a mess because I am always nervous (the feeling you get before you do something you are not comfortable with like presentation or exam) and I have this feeling all day it initially started with episodes of this nervousness but this week I am noticing that I am always tense. Does anyone feel this way??

My head is spinning, I feel like this quite often (I am gonna try to explain this) as if your brain is shifting L to R and then everything around you starts spinning like for example I was writing an email earlier today and I started feeling like this I literally felt as if the words I was typing were moving back and forth. Does anyone feel anything close to this.

I was just curious if anyone else could relate to how I am feeling :(