So nice to hear about all the scans and seeing the lovely pics of your little ones. Finally feels like we're getting somewhere.
Abbeyroad, I think they say to wait a year after c section because of the risk of implantation/placenta implantation on the scar tissue of the uterus. My consultant was very "clear" about not even trying to get pregnant after a whole year had passed... that said, I know many women who haven't waited and were absolutely fine... I also have uterine lining issues so maybe that was the reason for me and not in general (pinch of salt on info here too!)
Cryingbaby, is the pain on your side at bellybutton level or more towards hip or bum? if it's side then constipation could very well be the reason. If it's hip or bum then maybe sciatica, had it in my first pregnancy a lot and once so far now and it really hurts but not much you can do about it I don't think.
For those who mentioned the sharp pains when sneezing or coughing, these are more likely round ligament pain. Try bracing yourself before coughing or sneezing, or sitting upright if you feel one coming.
Ok, enough pretending I know anything about this stuff!!!
Hope everyone is starting to feel more normal.