Venting - I will never forgive my family for how they are treating during this time

I never realized how narcissistic my family is until i got pregnant. For reference this is my first baby after a loss and I am the last person of my siblings to have a child. After 8 nephews . From the very beginning of my pregnancy up until today (now 31 weeks) my mom and my sister has found ways to make every single thing a problem . In the first trimester My mom was upset I didn’t want to tell my family about my pregnancy until 12 weeks told me I was selfish. My sister was upset I told her I was pregnant with “everyone else”. In the second trimester My mom said she didn’t want to plan or discuss my baby shower until I was at least 28 weeks “given my history” and when my sister and mother in law started to do it without her she said “it was my responsibility as her daughter include her “. now more recently my baby shower is literally days away . My mom and my sister have been fighting and so have completely dropped the ball on all things they begged to be responsible for. My sister was supposed to bartend / help set up . Now she is not going because she doesn’t want to be around my mom. my mom had the responsibility of getting everything food , drink related. Apparently spent 1500 on food (I don’t even know how) and because she spent that much won’t get the other items she said she would get . Leaving me with the responsibility of getting Literally everything else (plates forks utilities) stating “she did her part so” I just can’t believe how this has played out and I don’t think I will ever figure them for it’s. I’m soo burned out I don’t even want to go to my own babyshower