Going through a break up while pregnant

Im scared, im heartbroken. My bf and I were together for 9 years we have a 6 year old and recently (4 weeks pregnant) became pregnant, for the past two months he’s been completely different. Doesn’t help around the house, doesn’t help with our child, our arguments turned into him always cutting me off, speaking over me and ending with “I don’t care”. He began drinking more and having no remorse.. I thought maybe it was a phase??? I would ask him if there’s anything deeper which would just upset him more. I honestly did think this would pass, foolish me.. I literally just found out I’m pregnant.. todays Mother’s Day I asked him to come with me to my moms (his mom was leaving somewhere) so we agreed to leave at 11am. He text me saying he wasn’t coming home (out with friends) till 1pm. I replied “this is my Mother’s Day too, I wish you were considerate I’m going to take off” he started blowing me up telling me I always want to fight and he’ll “remember this” I wasn’t responding because I was at my moms by this point. He proceeds to turn off his location and I have reached my end. Till this day I do not know why he put us through this because all of his actions showed me he did not want to save this relationship. It’s Mother’s Day and I’m crying because I just can’t believe any of this.. I decided I no longer want to continue this relationship when this is the way it’s been these past months and I’m terrified… doing this pregnancy alone.. I’m so terrified… we wanted this so bad and I just don’t recognize him.

I’m staying at my moms for now..

I don’t even know how to co parent a new born, I feel so embarrassed sharing my pregnancy with family knowing we’re not together…. I don’t know what to do anymore… I’m starting to believe he was with me to build up some resentment towards me.. I’m just so lost and afraid..