So sorry for your losses ladies.
I have a lovely two-year-old daughter, but after having her had four early miscarriages in 2008/09. I had the recurrent miscarriage tests done at St Mary's in London and they found a possible issue (weedy ovary!) but no definite cause. Was prescribed progesterone and low-dose heparin, also had early scans, and am now 26 weeks pregnant.
It has been a difficult, strange time, not knowing if could have more children, feeling bad for not feeling grateful enough for the one I have, guilty that my body wasn't working properly etc. Have had counselling and still go every few weeks, which has been really helpful.
Am still anxious, but hopeful.
Sadly, secondary infertility and problems are more common than is reported, and doctors don't always take it seriously (e.g. "should be OK/no need for testing as you've had a successful pregnancy").
Really hope that there are good things ahead for you all.