Advice?

So I'm supposed to get married 10/27/18. Everything started good and he was helping with planning and his mom was excited about grand babies (not knowing I can't give her any). I've been unemployed for a few weeks due to no car and living in the middle of nowhere and he works far away with no known time on being there or getting out. His mom's an alcoholic (like never eats or sleeps) and she's usually decent to me but the other day she woke up from a nap (mind you we had seen her like 30 mins before but had to run an errand she was sleeping when we got back) and she started in how I never clean her house and I'm lazy and I don't clean up after myself. I'm the only one that cleans up our bedding when we stay and he helps her with dishes but she woke up on a rampage to send me into a mental breakdown because I haven't been able to afford my anxiety and depression meds. I've been avoiding her which is all I really can do but after her outburst he started acting weird too. He never wants to shower together, rarely wants to be with me, and has to go to the bathroom with the door closed and never leaves his phone behind. Usually he leaves it out with the door open no problem if it's just us but he never wants me to be near it anymore and he used to let me play on it all the time... I can deal with her but him never wanting to be with me and hiding stuff like that hurts... He just goes through phases for like an hour of being lovey then it's right back on his phone and I just don't know what to do 💔