Remembering all the stuff you've learnt. One topic at a level feels like it is bigger than the entirety of a GCSE.
Being tired all the time, doing 4 a levels and the EPQ I have barely any frees and work in the ones I do have. So I'm working every single period. Then I come home and I'm too tired to do anything. I have to have naps before I can work again.
Having to constantly revise because I'm scared that at the end of the year I won't have time.
The workload. Doing 4 essay based subjects and having 2 teachers for all but one of my subjects, I can sometimes get 3 essays a week. Haha.
I love a levels though, I'm a nerd.