Can’t stop crying

So I went and got a donor with my fiancé I’m 17.5 weeks and I have surgery to remove a 10 inch mass from my tube and the tube. Well.... while she went on a work road trip I got a screen shot of her and the ex talking (she’s pregnant too not from mine or with lol) than I find she got into her old FB account that she said she couldn’t get into that’s the one she had with this ex. That’s not even half of it. Now I’m pregnant with her baby and have surgery in 9 days. I also have cancer cells on my uterus and I’m only 32. I can’t stop crying she tells me it’s in the past get over it ( IT WAS LAST WEEK N THE FINDING THE FB WAS LAST NIGHT) so I shut her phone off. She won’t stop calling and begging to just be apart of his life but says she’ll do one thing and does the complete thing other. Girls please help 😭