I just gotta tell someone 😓

So my period is never regular, it comes and goes as it pleases. However, since about January it's been coming on schedule which I was ecstatic about! With that being said one night (May 1) my friend and I were hanging out and it ended up being too late for me to drive home....one thing led to another and we had unprotected sex ;but he pulled out. I'm not worried about STIs since I know he gets tested regularly and normally always using a condom. Although I am worried about a baby! I have two apps to track my period and one app says that it should've came on the 4th but eve says it should've come on the 14th! And I still haven't gotten it! I'm not sure if I should tell him I'm late, because I don't want to freak him out; but honestly I'm freaking out! Could it just be that my period is back to its old habit of going ghost and playing games?