I need to get something off my chest....

Okay so Sunday my grandfather passed away suddenly from a stroke and bleeding in his brain. We laid him to rest Thursday. My mom barely cried when we were in the hospital as he died. Well she blamed his death on my grandmother which it was not her fault at all. At his viewing her and my stepdad were PISSED that my biological father was at the funeral my dad grew up with my moms family my grandfather taught him sooo much about life and so much more. Well my mom and stepdad were mad and told me my dad shouldn't have came and that it was disrespectful for him to be there and that she's not family. When my whole family that was there for the viewing all talked to my dad hugged him as he cried etc. my mom told my brother that she didn't even wanna be at her own fathers funeral and my stepdad (whom my mom was dating for 4 months before they got married. Haven't even been married a year yet) pulled my brother aside and told him he's disappointed in him for telling my dad to come earlier than what he wanted (stepdad) to the viewing. So my dad was having to avoid my mom and stepdad the whole time. He couldn't walk around and talk to people he watched my moms every move. Every time she went to the bathroom he followed her. After the viewing and funeral everybody went back to my grandmothers house to eat well while my mom was in the kitchen my stepdad stood at the back door by the kitchen and watched my mom to made sure my dad didn't try to talk to her cause he was in there talking to my grandmother about my grandfather. Well they were so tired of my dad being there that they left (my mom didn't spend anytime with my grandmother or family even though her father just died) today she wanted us to come to her house to eat. But we couldn't make it so she told me and my brother to never ask her for anything ever again and that we don't respect her or her husband. She told me I can go to my dad for everything and told my brother that they are not helping him come back to visit from Colorado ever again. And other hateful things. Also she's not helping me out with anything when my baby gets here that I can go to my dad for everything since he's "more important" so between me losing my amazing grandfather and my mom disowning me iv had such a bad week. I'm pregnant and going through all this I feel like my life is crashing down.