Do I have short term memory loss?

Okay so I think I have short term memory loss; not just because I put stuff down and forget where I put it but because I can't remember things that happened in the past. Like for example my mom was Looking through old pictures of last year and a few months ago and I saw a picture of me wearing my Halloween coustume, now this was only a couple months ago, and I Never remember buying that coustume or putting it on! And I do also Put stuff down and forget where I put it. I've even tried to use sticky notes but I forget where I stick them untill my mom finds them and tells me. Also another example is I can't remember my teachers from last year. I don't remember their names or what they look like, and I think it is VERY odd that I don't. And durning school I also forget what I am doing or I forget what class I have next. Should I go to the doctors and get checked out, also I have been Having bad migraines. And no I never did drugs, smoked, or drank in my life, I'm only 13. Please help! Thanks, and please no rude comments!