I had endo removed back in november 99 and I was pg by May the following year - one month after coming off Duphaston (to treat the endo) and it was a surprise pregnancy. The next 3 pgs were conceived on the first month of TTC. So it can happen - not everyone who has endo has a hard time with falling pg, especially if you have recently had lap surgery done to remove it. Good luck and I hope the BT results come back great!