Predicted 6 but got a 4.

I feel so lost and confused, I took my SL exams in may and had a predicted 6 in two subjects but got a 4 instead. I know it’s not the worst possible outcome but I’m heartbroken, these were subjects I genuinely loved and thought I had a really good understanding of, but clearly not good enough. My grades itself in both classes were really high and I got high grades on the IA’s too. I don’t know what went wrong. I’m the one my friends would go to help for and I literally got lower than them. I just don’t know what happened because wtf