I am having this awful cramping similar to AF on cd26. I jumped from a 33 day to 29 day cycle. I also have PCOS and I have 1 child. I conceived twins 8 years ago after the 4th cycle of Clomid, but lost one of my babies!😢 I tried early this year with Clomid but didn't conceive. Since stopping in June, I have had the strangest thing happen to me. I have had a regular cycle and that has never happened in my life. Now I'm cd26 and last night the DH and I BD and it was painful. Now I am cramping very badly. What could this be?