depressed?

I got a concussion about 3 months ago and because of it I had to stop cheering (which I did 7 days a week because it's one of the few things that brings me true happiness, and stop going to school, so I haven't been able to see my friends much. The first month - 2 months I had severe headaches constantly and didn't want to do anything, now my headaches are much better but I lack any motivation. I don't want to get up in the mornings I don't want to see my friends and sometimes I don't even want to go back to cheer. I feel so stressed out and really sad I constantly find myself crying without any good reason. Does it sound like I'm becoming depressed? What should I do?