Open Question: Could I be anemic, is there anything i need to do for being anemic?

I've been noticing every time i am bitten by an insect (ant, mosquito, etc) and they start to go away i get bruises where the bites were. Also when i go swimming with friends i am freezing and they are having a ball, which is weird because i live in Arizona. I am 13 going on 14, 101lbs, and haven't had my period yet, my mom says i could be anemic, am i?