Moms not there for me

I'm not sure what to do. It's a very long story, but my mom recently got another new boyfriend and kind of quit paying any attention to me. Then she needed help moving so my husband and I went to help and her boyfriend hired some other guy to come help too. Long story short it got super late my mom had to go to work, and her boyfriend ditched my husband me and the other guy. Didn't pay the guy, the guy had no way home. My husband and I stayed out till three in the morning trying to help the guy find a way back home. Then we finally got to go home. After that my mom was all mad at us that her moving plans didn't work out, when she had nothing planned at all so that's why it turned into a mess. So she quit talking to me for a couple months. Then finally called me, didn't apologize, and blamed everything on my husband, who she apparently hates now. I missed her though so I forgave her a tried to give her another chance, cuz I'm hugely pregnant and needed my mom. The very next day, a few people we were friends with started calling a texting us telling us horrible things, come to find out my mom had apparently over the past few months been spreading rumors about my husband and I that were completely untrue. Now those people won't talk to us. I confronted her about it. She didn't respond to my text, but posted on her Facebook about it. So I texted her again, waited another few weeks. Still nothing. Then all of a sudden last night sends me a text acting like nothing happened and she got none of my texts pretending like she's concerned about me and she misses me... what the heck. I don't know what to do. I want her to be there when I have my baby and I miss her but I can't go through this forgive then she does stuff again. It's been like this my whole life... and I don't want my baby to grow up the way I did, constantly being used or treated badly then being the one to forgive for the sake of the relationship without an apology, then the cycle starts over again. Idk what to do. I've told her over and over that I can't d this anymore and she doesn't respond then pretends like she never got the messages. I'm 36 weeks pregnant and measuring 3 weeks ahead. I want my mom to be able to be included, but not like this... what should I do?