Hi kmjl and welcome

Im sorry that this is the path you have to take to TTC. Whilst it doesnt seem that way, not finding endo had got to be a good thing! A D&C was not neccesarily a waste of time, I dont think especially after IVF cycles. One of the hard things with IVF is finding just the right blastocyst that wants to 'take'. This might happen quickly or it might take years.

FWIW we had unexplained infertility, no cause, no reason, no explanation yet 11 cycles later we still hadnt achieved a BFP. I know how you feel, it is so frustrating to be continually told 'oh it all looks great' and still not get a positive result.

Hang in there. I hope your bub isn't far off