No judgement please just need advise

So me and my fiancé have been together for 3 years, we recently split up a month ago because he cheated on me. I feel like I have outgrew him. He isn’t mature at all, he is wanted by the police now, my parents don’t like him... the list goes on. Well while we been broken up we still have been hooking up. We tried to get pregnant when we were on good terms and I did get pregnant but lost the baby due to RH incompatibility. We hooked up on a lot of my fertile days (not on purpose) and now I’m 4 days late on my period. My skin is really dry and I’m breaking out and my nipples are darkening. I’m so scared to test because I do not want a relationship with him at all. I don’t know what to do.... advice?? Do you think I could be pregnant or is it just late from stress caused by the breakup?