Background: 2ndary amenorrhea. Took Clomid and Provera to induce cycle 3 times. First 2 times, got period 2 days after finishing. 3rd time, got period 1 day BEFORE finishing.
I switched to an RE who put me on Letrozole and gave Prometrium after ovulation in case I did conceive so my progesterone levels would be higher. I was told Prometrium would make me not get my period, so stop if I had a negative pregnancy test. I stopped Prometrium on CD 24 and have not gotten a period yet (Day 29). At my Day 14 U/S I had 1 follicle. I've been used to getting a period from withdrawl of progesterone, but is it possible because I had a follicle (and didn't O the other times) that my body is taking over and I'll get a period when it's ready instead of with the progesterone withdrawl? I know I technically "should" not get a period until today based on CD, but I've always been used to progesterone withdrawl periods.
Thanks!
March 2011: Off Nuva, cycle back to "normal" for me: No periods since 15 years old.
June 2011:Provera&50 mg Clomid; Progesterone:0.7
July 2011:Provera&100mg Clomid; Progesterone:3.29
Met with RE:No Clomid response, begin injectables Sep
5 mg Letrozole and Ovidrel in the interim month. Cut out running (was a distance-runner), cycling, eliptical. Restricted to weight-training, walking, pilates. Brain MRI normal. Being physically over-stressed is the reason the body stopped producing prog.
Late Sep 2011: Menopur, Ovidrel,& IUI (10.10.11):BFN-Great injectable response: 2 mature, 6 near mature, many smaller; Problem: 9 cysts! Dr: IUI too uncontrolled for number of viable eggs & age. On to IVF! IVF ER 12.6: 37 mature eggs, 27 fertilized, froze all to avoid overstimulation; FET 1.22 (2 Grade 1)=BFN; FET 2.22 (3 Grade 2)=BFP! Beta 10dp3dt=291; 12dp3dt=644; HB 3.26!! 174 bpm: Vanishing twin almost completely absorbed 10wks

Re: PROMETRIUM AND PERIOD TIMING?
Hey there
Couple questions.
Is it possible that despite seeing the follicle, you didn't actually ovulate? It will be tricky to confirm via blood work since you took the prometrium.
How many DPO do you think you were at CD 24?
Other than that, different cycles can be different. Sometimes the withdrawal bleeding doesn't kick in for about 10 days? If after that long you still don't have a period, definitely call your doc. And consider taking more pregnancy tests in the meantime?
Open Heart Surgery @ 5 months old.Happy, healthy, and as normal as could be! We thank God every day.EP/BF for 12.5 months
TTC#2 - November 2012
BFP #4: O'd on CD25 (Aug. 2014). DD May 6, 2015. RCS planned.
Beta@14dpo: 184, 17dpo: 520. 44 hr. doubling time. p4: 54U/S 8 weeks 1 day, 161 bpm
sammyslick, you're right on. If you're not pregnant, after you stop the prometrium, you'll get your period. If you are pregnant, it does help sustain the pregnancy and you won't get your period. I don't have PCOS, but I don't think that makes a difference. And I don't think I'm pregnant as our RE did not think Letrozole would work as I didn't respond to Clomid, but I needed a couple ultrasounds done before I can move on to injectables...which I'm waiting to do...if only AF would come!!
This happened to me too. I was on Clomid & Prometrium. I was told to test at 14 DPO and if it was negative, stop taking the Prometrium. By 18 DPO, I still hadn't started & took another test that was positive. After that, I immediately went back on Prometrium until I was 11 weeks. Depending on your situation, you should consider testing daily, as the Prometrium will help a pregnancy until the placenta takes over. (that was my doc's orders, but again, my situation called for it).