Hormonal replacement pills

Gabrielle
I start taking my hormone replacement pills on the 10th, and the fallowing 7 days I start my cycle... Doc say I can still concieve. 
(I have been on these pills a year now but recently considered conceiving, it's been 6months of trying. But nothing yet.) 
I'm out of my fertile window and will wait 7 days to take a test.
Does anyone else have this same problem? Or has taken these pills and still conceived?