family bullying, what can I do?

I am 30 and I have Aspergers, ADHD, Depression, Anxiety and PTSD due to multiple forms of childhood abuse including being hit unneccesarily and with excessive force in private and public, being humiliated, having vital surgery witheld as a baby for a physical problem that left me bed-wetting for 13 years, being moved from place to place due to father's instability, being dragged from religion to religion again due to father's instability. When I was 14 I chose Islam and got involved in a pretty hardcore group which drove my parents crazy and I once slapped my Mom for saying all muslims should be exterminated (I was 15). I took an overdose aged 16 and was crying in my Mom's bedroom so she ordered me out and didn't care cos she wanted to sleep, so she stripped and showed me her vagina with which I ran out. I was seeing a child psychologist from age 14 to 17 but the therapist couldn't engage my parents (this is in my notes). Dad died when I was 17 from Crohns Disease. From age 17 to 21 I went to Guatemala, came back after being knocked unconscious by an abusive partner. Told Mom I was gay and she was extremely homophobic but has now partly overcome that. My previous partner knocked me out cos he hated my Mum and swore about her so I shouted at him. Current partner of 7 years also can't stand to be around my Mum cos she's so cold and uncaring. Mum has known my diagnosis for years but now refuses to acknowledge it, her current husband thumped me once during an argument, Mum sticked up for him not me. Now I'm getting married and she doesn't want to know. She has turned my uncle, step father, brother (who's 3 year old son I have never met), and grandmother against me. I'm not even allowed to see a photo of my nephew. She tried to set her cousin in America against me but she wasn't having it, and my uncle tried to set my paternal Aunt against me but again she told him that I was abused for definite and that she witnessed it many times. Whole maternal family have turned against me and are saying that I'm lying about the past. Uncle phoned my partner and threatened to sort us out and call police and lawyer if I continued to harrass my grandmother (his mom), but I only called her once to ask if she'd sent a birthday card cos I never received one and she said no cos I dont have respect for my mother and hung up.