Femara has given me 2 mature follicles

I was at the fertility clinic this morning for cycle monitoring. I have 2 mature follicles that are both 17mm, the clinic says anything over 16 is mature. I also have another little one at 13.   If it matures we will have an IUI. I have had 2-3 follicles in the past and I haven't gotten pregnant, so I don't have high hopes of anything happening this cycle. My lining was 6.8 which I think is too thin, but my doctor said it's good. I'm going back on Sunday to check on my progress. Femara usually causes my follicles to grow very fast. Once one of them grew 4mm in a day! By Sunday who knows how much more they will grow.