Not much of an idea at all, Collo... but I did have on/off AF pains after my FET and it all worked out.

Have you asked your clinic? I know the nurses at my clinic were only too happy to answer questions if I had them. In fact, they called me about four days after my transfer to check that I was going ok - could be worth a phone call to put your mind at rest.

Good luck with this one, Collo!

BW