grab your big bowl of popcorn!!

Got your popcorn ready? good! so here's how this goes. My lovely, lovely ex (who I'm still in love with) called my brother to talk to me. yes he called my brother. who in turn called my mom because she is closer to his house than I am. (I'll get to that part) Well I have a beautiful black cat who just loves everyone! who is currently at my ex's because at that point in time when we split I had no where to go. So I moved South 6hrs from him and everything I know and love to start over. Well, fast forward 2 months after the split we don't talk due to him and everything he has said. I've blocked his number but can still check the messages( which of course I don't) . He can't get in contact with me at all, hence why he went to my brother. now we are 8 years apart. Well, anyways, I text him, and he starts talking about his most recent ex. Which is fine. I don't mind rant away I'm just that person I'll always listen. Well after spending 4 hours talking about everything that's been going on. we both go to bed. Well the next morning I wake up and have a good morning beautiful text from him which I don't mind because I do still love and care so much about him. But he drive's me crazy sometimes. Well fast forward to 10am that day and he tells me I think you should know (we will just call her "SHE) she's pregnant, and I don't know if it's mine. okay no big deal, because we aren't together it's not a problem for me but I do have anxiety so my head starts spinning and I don't know how to take it because back in January we found out we were pregnant. come February I lose the baby. But anyways now, he really doesn't know who's baby it is because he could be the dad or it could be 1 of 2 other guys. This girl already has 2 failed marriages 1 little boy who's dad she has no contact with outside of court. now I'm not going to be mean about about the girl because I don't know her. I know him. And I know I love him. And I know that this is all going to be okay but in this situation what do I do?