Could I be pregnant again or is period still regulating?

I’m 4 months postpartum and on my 2nd period cycle since having my first baby. Hubby and I slipped up and had sex twice unprotected (I don’t remember when exactly, a few weeks ago) but did pull out method. My period is 3 days late but I’m not actually sure since I heard your period takes a bit to regulate after having a baby. I am EBF but got my period back in April cause my baby started sleep through the night thus dropping a feed. We wouldn’t be upset if we were pregnant again cause it took us years to conceive our baby so I’m not freaking out or anything. I’ll be getting some pregnancy tests in a few days so I’ll take one then to know for sure but was wondering what y’all think? I’ve been moody for the past week but that’s about it.