Swelling and sick after having baby?

hi , urm i was just woundering is it normale after haveing a babee 6 weeks ago to start to swell up and get sick like all the time im 15 and ever science i had my babe i have started to feel a lot more tierd my body is swelling up and every were is really saw and im sceard i migght have something wrong with my body and i dont want that to effect my daughter some good advice would be nice please ?