Am i pregnant?

i had a but i didnt ave full just got poked while the guy was havin wiv the other girl (he was wearin a condom) and im 3 and a half weeks late wiv ma period! im onli 16 and just started my period last year so am i pregnant or just irregular coz of hormones? im reli worried im not redy 2 ave a baby! plus my belly is quite bloated but i ave always had a bloated belly since last year. i have no other symptoms except missed period. i am still a virgin aswell.