Has birth control before a ivf cycle over suppressed anyone?

My Re put me on birth control and estatest for 3 weeks.To restart my body.(he also said to give my ovaries a break.) So I got my period with the most painful cramps I have ever had. Then we were going to do a natural ivf cycle.I am on cd26 nothing no follie e2 still less than 32.This is so strange because I always get a follie. I think the bc and estratest messed my system up.Of course the Re's are saying it has nothing to do with the bc and the estratest. That it is my screwed up body. I don't get it. I am so confused and worried this is it . Has this happened to anyone?