First Period and then No Period

Me

Before I got pregnant my periods were pretty normal, same day each month, etc.

Last month I got my first period on 6/14 since baby was born in December. And was just about finished on 6/17.

I had sex on 7/4 and have not received my period. I’m not on birth control and we used pull out method.

My husband and I aren’t on the BEST terms (we basically never have intercourse and are dealing with addiction problems—therefore I just saw no use in being on protection).

Idk if I’m just being paranoid. Once our company leaves I’ll take a test. Was anyone else’s period different after baby when it was normal before baby?