Thanks for all your replies and support....mn is so wonderful.
It sounds a bit stupid (and to be honest I feel stupid to be in this position) but I hadn't really thought it through about having a third, I just had never ruled it out, in the way a lot of people I know have. I mean they have two and are very clear and sure that they are done with having babies.
I am really rubbish at knowing how I am going to feel/react to a situation until it happens, so I didn't really know how I felt until this happened and I panicked. This isn't a very helpful way to be when it comes to making decisions.
The counsellor can't see me today, but I'll try her again. The last time I saw her, she did suggest that terminating this pregnancy is making a commitment to the children/family I do have now, which sort of stuck with me. she said having another baby could be seen as a distraction....of sorts, a distraction away from the children I have and the life I lead now.....or something.
I am quite frightened by going through another pregnancy and birth, plus I worry about the children I do have, and how they will feel, and how I will feel about my life.
If I have a termination now, I think I have to come to terms with this being it....no more children. There is a relief in that but it also feels sad....and sensible, and I'm not used to being sensible....it doesn't come naturally to me, but maybe now is a good time to try...