Can i be pregnant ? i hope i am :-) and im 15?

me and my boyfriend had sex on the 5th of this month and he came in me 4 times , i got my period on the 22 of march for 5 normal days .. ive been peeing alot and i been having mood swings some diereah eating diffrent and back and also lower and upper abdomenal pains .. my stomach isnt hard though , could i be pregnant ? i hope i amm