Desperately need advice regarding the pill that causes you to miscarraige - without harsh judgement please?

Ok so I got stuck in this relationship with someone who I should of broken up with a long time ago. I have a few medical conditions that makes it that I totally should not be pregnant right now. Also, one of my medical conditions makes doctors hesitant to put me on birth control. So I was using condoms with my boyfriend, this is the last time we had sex ... apparently he took it off and put half his load in me and then told me afterwards hoping I would get pregnant. Was too late for me to take the morning after pill at that point. So .. I got a period, although it was short which due to my medical reasons and stress this sometimes happens. Then I took a negative test, and thought I was in the clear. Soo I broke up with my boyfriend after this, this was the last straw. Now a month later, soon I know ... I am seeing someone else. Timing might be bad, but I wasnt going to let a guy that very much so seems like a great match for me, and is really sweet ... wasnt going to let him pass me by. He sought me out (I knew him bc he is a good friends of mines from high schools older brother) So we have been seeing each other only for 2 weeks, and now all of a sudden I have symptoms, my boobs hurt, etc . I take a test, and it comes out positive. I know it is from the ex. He is a drug addict, and abusive. Has alot of issues. And was trying to get me pregnant on purpose. I do not normally believe in terminating a pregnancy, I just cannot go though with it with the situation at hand. The current guy I am seeing is very supportive, as he knows the history with the ex, and why I broke up with him. Also, we tell each other the truth about everything. Also, I am not a teenager just so everyone knows. My plan is to get the pill that makes you miscarry. How many weeks can you take it up to? And how bad does it hurt? Im in a real tough position here and cant believe this was successfully intentionally done to me. Need good advice.