could i be pregnant

My boyfriend and I had sex May 24th and he didn't wear a condom but he came before we had intercourse. After, I bleed for like 7 days but it was rlly light not like my normal period cycle, I don’t start again until June 27th. Should I wait until June 27th or so to see if my period comes? I'm rlly scared that I'm pregnant and my parents don't know that we had sexual intercourse and I rlly don't want to tell my parents. PLEASE HELP!