MY heart goes out to your missus and yourself
I had miscarriage between my two children. They are very normal and very common, knowing that didn't help much at the time, I just felt lost.
What did help was an idea from Tibetan buddhism. They believe a spirit of the un-conceived float about looking for parents and chose their next incarnation. Sometimes their new full life is not ready, so they need to visit somewhere warm and loving to rest for a while. Tibetans call miscarriages and stillbirths ' little visitors '. Having been through it, I could feel the spirit come and go, and this idea at least gave some meaning to what doesn't really make much sense.