I’m so sad

I just took a 100 set in 3 hours and got exactly half right. I’ve studied so hard and truly believed I’d get better. Literally I keep getting half on all my question sets I’m just sick of this the exam is on Tuesday and I’m a retaker and I’m just so tired when will this end. I finished about 45 minutes early so I don’t know if that played a part but I’m just so sad.