I have irregular cycles, but this has never happened to me before. I got my period June 28th to July 2nd and it was my normal flow. Then on July 16th exactly two weeks after my period ended, I started to bleed and it got heavier like my periods do. Could this be my period again? Why would this be happening?

I only had sex twice since my last period and we used condoms and we checked for breaks and there wasn’t any (plus he finished on my chest — TMI sorry). I’m just concerned because this never happened to me before. Could this be from stress or am I pregnant?