*UPDATED* Advice: Talk to mother or hide? (WARNING: long and possible triggers)

So, I'm 36 weeks pregnant. And my family had no idea.

Keyword: had.

I ran away at 16 from an abusive household - mom would talk about how I ruined her life, how she had full rides to colleges and then two lines appeared on a pregnancy test. How my twin embryo at least took it upon their self to quit growing, so why couldn't I? We would argue damn near every day about everything, as I was a strong-headed teen who loved backtalking and hated being told that I was a mistake.

And then there was my step father. When he first came into my life at 8 years old, he was a sweet man who ensured dates were something I could also enjoy, as "I'm dating you as much as your mom, because I want to make a life with you both". Well, as we established a family with this man, slowly, the inner demon came out: alcoholism, abuse. First, my punishments were simple belts across the knuckles. Then smacks. Then punches, kicks, being thrown. And my mom sat there and did nothing - she would sit there and watch me be abused, and only after would she assess damage, more so to make sure it wasn't where it could be seen. I was blackmailed, emotionally abused, and made to think I deserved all of this. Luckily, long story short, my senses became clear and I haven't talked to this family in two years.

Obviously, I became pregnant, as mentioned before. I haven't told my family at all, and they would have had no idea until I invited them to a supervised visit at the hospital. But for SOME REASON, my insurance sent my Labor and Delivery Preregistry information TO MY MOTHER'S ADDRESS. I'm on medicaid currently, so I'm assuming that somewhere in the system, it saw I was once under that address and it just happened - I doubt the medicaid company did this on purpose, laughing maniacally. But my mom now knows, and according to some people who have had contact with her, she is livid. I have no doubt my step father is as well. So should I get in contact with them now that the cat is out of the bag, or should I wait? Any other advice is also greatly appreciated.

If you made it this far, know that I love you for your efforts lol! Thank you all in advance!

UPDATE: Again, thank you all. I really needed your words, as when I typed this post I was still in the initial shock and "oh fuck" stage 😂. And your words made me realize that I was panicking out of fear, and I shouldn't be scared of my parents like that, nor should I invite them to meet their grandchild if they haven't exactly been parents in the first place. I wouldn't be surprised if my mom pulls something to try and get to me - she's had me thrown in juvy on false charges and tried to get my fiance dishonorably discharged from the US Army. But until she's pulls another dumb card like that, I don't plan on letting her know more than whatever sent to her address. Thank you all for being the rational and blunt voices to smack me out of my panic.