It's hard. Those are her feeling and are valid and yours are valid too. You an be nice and try to reach out but if it does not work, let it go.
I feel for you as I had a sort of similar situation.. not with a best friend but hubbys best friends wife.. I fell pregnant and we weren’t telling anyone until 12 weeks, they kept joking around about me getting ‘fat’ but when we told them we were pregnant they vanished.. apparently didn’t like the way it was all a bit of a joke as they thought we were taking the mickey out of their situation (fertility issues) but they didn’t seem to care when they were calling me fat 😅 we then had a miscarriage and they found out and left Lilly’s on our doorstep.. didn’t bother telling them about the 2nd pregnancy which also ended in miscarriage.. 3rd time we fell pregnant they were more involved again so told them and the best friends wife said she was going to be distant as it was too hard for her (despite her having loads of friends with kids) so we just let her crack on.. she drifted in and out and at 20 weeks completely vanished again.. only popped up again at 36 weeks..
She only popped up then because she heard I was being induced and she was doing a placement at the hospital at the time.. she’s minimally bothered since my boy has been here and I’ll be honest, the friendship has very much broken down and will never be the same again.. I get people hurt but I never once made my miscarriages anyone else’s problem.. I processed in my time and dealt with it my way.. I was surrounded by new borns and children around my miscarriages.. I’d never have acted that way towards any friend x
Honestly I don't buy her reason. She's going to see pregnant women, newborn babies and toddlers wherever she goes for the rest of her life. Why would your specific baby be such an affront to her? This reads as she's jealous of you, from my perspective and experience of people acting like this... I'd let the friendship go 🤷🏻♀️