Hi MissMash, I've never been in this situation before but wanted to send you some hugs!! You poor thing, it sounds like a very difficult situation to be in.
The only thing I'd recommend is to tell your partner you are in fact pregnant so you can discuss it together & make the decision together. Hopefully then no matter which choice you make you will have more support & someone to talk to about it.
I hope you don't do anything unless you're absolutely certain about it.
Good luck & I hope you choose the option that's right for you. No matter which way you go, there are so many lovely ladies on here for support. Xx.