I've had the ERPC and the tablets (ERPC at just before 11 weeks, tablets at 9 weeks)
I was scared of the operation but in fact it was very straightforward and over with very quickly. I found the medical management very very painful and that added to the general shitness of how I was feeling at that time.
If you are already bleeding then nature should take it's course soon enough anyway, but that can be quite long and drawn out for some people too.
It really is a personal decision and you should go with what you are most comfortable with and what would be least traumatic for you. Some people prefer to avoid the hospital at all costs and get on with it in the comfort of their own home, whereas others want the whole thing to be over in the shortest possible time.
I'm very sorry that you have found yourself in the horrible position of having to make this choice and I wish you a speedy recovery.