Im Nervous

I was inactive for 6 months because my boyfriend dumped me but we got back together and on last Monday I had sex with him, but he was protected with condoms, on Tuesday I also had sex but at this time I was with my best friend he also protected himself with condom (I know that's a big mistake, don't judge me), my period is very irregular, at the time of my sexual relation with my boyfriend my period was already late but obviously I wasn't concerned because I didn't had any sexual activity in those 6 months, now im very concerned because my period doesn't appears since June 12 and we are already on July 31. HELP PLEASE

Pd. Im pretty sure non of them came inside, and i think the condoms were in perfect conditions. Although im very concerned... I cant have any children at this time because im only 17, going to senior year and my parents would kill me!