OP
I'm really worried about your decision making right now. If you abort this baby, it won't all "just go away".
Your life isn't going to spring back to normal just because you're not pregnant any more.
This baby was loved, wanted, named, and bonded with before you found out your partner was married. It's a different scenario to it not being wanted, or so ill there's no way of continuing.
I had an abortion at 6 weeks 15 years ago through Marie Stopes, and even though it was absolutely what I wanted, I still felt rushed by them, and the counselling they advertised never materialised. I was one of many and I felt they were committed to the procedure and not interested in anyone's doubts.
I know that was my experience, and it was years ago, and I know there is a time constraint for you, but that they can't provide counselling beforehand I find appalling for someone in your situation.
You'll need a lot of support afterwards OP, you really will. If you go ahead please please make sure you have lots.
If you decide to keep it, please remember that the father will be liable for maintenance. You speak of not pursuing this, but you're coming from a place of hurt and pain right now, but that won't last. The man is a total bastard, no mistake, especially for putting you in this position.
I think your doctor is right. I think you're so poorly you can't think straight, and from all that you've said it doesn't sound like Marie Stopes have given you enough pre procedure support.
Please please make sure you're 100% sure you want to abort OP.
❤️❤️❤️