When I was facing the backseat of my car looking for something in my bookbag, the bookbag started to fall. I caught my bookbag extending my left forearm. The weight of my laptop, huge pharmacology book, and notebook fell directly on my forearm, with the majority of the weight on the ulnar side. The angle I was at, my right arm couldn't lift the bookbag, so my left wrist/forearm lifted my bookbag back onto the seat. It's been hurting and then I went to my kickboxing class and it's been worse since. I have pain all the way back near my elbow in the muscle on the ulnar side and that extends forward around the pisiform and then forward towards my ring and pinky finger. I can still bend my wrist, it just hurts with flexion and adduction. Is this a strain? And if so, is there a way to wrap it to make it more stable?