You should be able to show a clear decline or interuption in your grades. I am 40 they went back over 21 yr on me to my high school days and tried to use things onme. They can not do that to you. They want to try to prove you are lying or cheating. So cry, complain if you want to quit say so.
Discovery is for each side to decide what they have and exchange info.
It gives the lawyers a chance to see what each other ahs got and what they can use. They will be there with you.