20 days late on my period, don’t know what is going on 😣

Perla

So I’m 20days late on my period and it’s concerning me now, I’ve taken pregnancy test and they come out negative, took one today too, me and my boyfriend always use condoms and he has never came in me, I have no symptoms of pregnancy. I’ve also never had irregular periods, since starting to have sex I’ve been a day or two late. I don’t know what is going on, anyone ever been this late? And not end up being pregnant?