Taking me cold turkey off my meds

savannah
My name is Van and I'm now thirteen weeks pregnant. I've had three miscarriages in the past,(once after I lost my viginity), so this was a complete surprise. Not to mention my boyfriend and I haven't had sex since and about 4 mo before June 9 (conceived) 
To get to the point I am in the film industry and did not want to have a baby especiallyj with a man who neglects me physically as well as emotionally whom I've been taking care of the majority of our relationship. I didn't even get the symptoms until after a month & a half. 
I finally went to my psychiatrist and told him that I was going to get an abortion but couldn't do it, missed my appointment and started yelping a new facility. This facility happened to be pro life and performed an ultrasound. After seeing the baby there wasn't going back. 
He immediately got scared saying he could lose his license if anything happened to the baby so he cannot prescribe me my meds I've been on off & on for over 7 years. 
I'm a recovering heroin addict and take less than a quarter of subutex a day & Xanax 2mg twice due to  PTSD from my mother dying from an asthma attack in My arms at 17. With these hormones I've already had an anxiety attack not taking my Xanax and broke a glass framed picture just by tossing it on the ground. That scared me along with the common knowledge that withdrawal from Xanax can lead to death. 
The dr said he needed a letter stating it was alright to continue me or wean me off but was afraid he would hurt the baby if he continued me. It wassunday and I couldn't call anyone for a letter and explained I don't even have an obgyn yet. I had to purchase them from my friend who is prescribed until my dr appointment because I know I am not only putting myself at risk but my child
Does anyone have any advice???