You could have been me a few weeks ago. Already have DC plus stepDC, and we've known we've been done having any more children for a while, DH waiting on vasectomy appointment.
Condom failure, took MAP, but still pregnant, I'd never really looked into the MAP but I didn't realise it wasn't effective once you've ovulated. Seems a bit of a design flaw, but I digress.
I already knew deep down I'd terminate and when I told DH his thinking was the same. However, I was settled in my mind what my choice would be before I told him, and I think you need to take the time to decide too before any other influences have their say.
I got pills by post, I was around 7 weeks when I eventually got them delivered. Took the first pill at home on a Thursday, second lot on the Friday afternoon, things hit a peak on the Friday night and by Saturday evening I felt pretty much back to normal. It was definitely easier doing it at home (I had a medical termination in my late teens which had to be done in hospital and felt much more traumatic, I always swore I'd never have another one) and I managed with standard pain relief.
Only you can make the decision and it's not easy, both choices have their own issues to contend with. Even though I was certain I didn't want another baby, I felt very mixed emotions and still do. Seeing the pregnancy test go back negative was sad, reflecting on the joy previous positive tests had brought. If you don't continue, please allow yourself to grieve if you need to, just because you've chosen not to continue with an unplanned pregnancy doesn't mean you can't be kind to yourself. It's complicated whichever road you go down, I wish you the best.