pregnant and confused

I've been on prescribed hydrocodone for 4 years. Graduated to oxy a year ago and found out that I'm pregnant 5 weeks ago. I tried to get help. 2 docs pushed me off onto a pain management doc and the pain manag doc threated to have me arrested for possession. Class 3 felony. I don't know what to do. He did give me back some hydros so I can attempt to taper. But I wasn't on the hydros, I was on oxy. He gave me 30 pills and said to take one a day. He said that if I failed a drugg test that he would call the sheriff and put a stop to all of this. So now, I'm at sqaure one. I wanted off the pills. I wanted what was best for the baby and now he has dropped my dose by 75%. I will be lucky if this baby even makes it past the first trimester. I told him that stopping so quickly could cause a miscarriage and he told me that it was a risk worth taking. I don't know what to do.