I was playing basketball w/ my friends and she threw the basketball to me. I wasn't paying complete attention so when I tried to catch it I ended up pushing my middle finger into it and crushing it. Now it's swollen a little bit & sensitive when i touch it or try to bend it. I can't apply pressure to it without pain. I'm pretty sure it's only sprained, but in the area it hurts most (bottom of middle joint) there is a bulging vein. I don't know if this is a symptom of a sprain or if maybe it's a pinched nerve?