Afraid I might be pregnant again

My child father and I have been through a lot and I’m done with him I’m ready to leave him but I’m like 4 days late. I took a test like 1 day before my expected period and the clear blue looked negative so I was relieved but it’s still not here yet so wth! I was just recently pregnant and lost the baby and if I’m pregnant again idk how I’d even tell him I don’t know what he will think, a baby can’t bring us back together.

I always say I don’t wanna have sex cause Ik you’re a cheater but he would really beg me omg.

Only time I’ve ever been late like this is when i was pregnant and I had a few pregnancies. I just can’t believe this if so I’m afraid to be a single mom of 2 and it’s my fault.