If you've read my recent post, you'll know I have a lot of things going on right now, but I wanted you to know that I could have mirrored you up until DH left!
I have a child that was a miracle after 3.5yrs TTC, so I just assumed that even with IF it would happen again for me. I was desperate for another child and I don't mean to offend anyone on the boards here, but having had an OE child, I think that the need for a second child is just as desperate as for a first child. The longing to be a mum has been filled, but there is no reason why we can't long for more children and not just for our sake, but to have a sibling for our first child and to 'complete' the family unit.
I truly hope that isn't offensive to anyone as I remember how desperate I was for my first child too, but my point is merely that it is all relative and all feelings in this awful IF journey are justified. Don't be too hard on yourself. Have you considered medication to help you through this time. I know it's not for everyone and I personally didn't respond well to anti depressants, but your counsellor would have more knowledge on strategies and medications that could work for you. Come here anytime. Sometimes just knowing you're not alone is enough to get you through the day.
Much love to you.