I'm scared

I know it's too early to be stressing but my period is literally always on time. It starts at midnight it shortly after.

I have stage 4 endometriosis and it's very hard for me to get pregnant. I want a baby badly but I also want it with the right person or a sperm donar. If using a donar I don't want to know them personally. Anyways I've been dating and met up with a guy I met online on new year's eve. We slept together the same night and didn't use protection. We also slept together January 2nd. So two days in a row... Usually I pay attention to this app on when my pregnancy days are but I didn't this time. It said my medium and high days were January 1 & 2. Now im scared as me and this guy absolutely do not get along. From spending 4 days together I've found out he doesn't view women equally. I want a baby but not his. I know it's stupid of me sleeping with a stranger using no protection cause there are STI's out there. But I can't take it back now. Im literally at work stressing. It's almost 5AM and I keep going to the washroom to check. I really hope it's just late although it's never late. I don't want an abortion as I would be very lucky to even get pregnant. Ughhhhh.

What do I do? If you were in this situation and found out you were pregnant would you tell him? He has every right to know. I don't want to be a single mom again. I already have an almost 8 year old. But I absolutely don't want to be with him. I don't know. Im an idiot. Please pray for my period to come y'all.