HELP!!!! COULD I BE PREGNANT?

ok so me n my bf had unprotected twice he came inside of me both times. about two weeks later i had a very lite period but it wasnt like my period it was more like a brown burgundy it lasted for two days. its been three or four weeks now and ive been feeling really hot but having a normal tempature.feeling nauseous.having this shocking pain in my sides.headaches. feeling uncomftorable and mood swings. my are hurting alot. and im bloating like crazy! please help could i be pregnant?