We had a chemical pregnancy last month (5 weeks, 2 days). Everything went relatively smoothly (it all happened naturally, and after getting over the initial shock, we were excited to try again). I am used to a 33 day cycle ... but because of the pregnancy, my ovulation calculation app is off by about a week. It's been hard to predict ovulation (aside from CM) this month, and I am now realizing why my doctor said that physically, it was fine to try, but for dating purposes, it's tricky. For clarification, we used the first day of bleeding as CD 1. My GYN said to treat it like a normal cycle as long as we were emotionally ready. I know at CD 17, I had HCG levels at less than 1 (tested by my GYN), so everything went back to 'normal'. I just wonder if your cycles went back to the same they had been before your CP, or maybe longer ... shorter. I'm now at CD 28 ... If I'm not pregnant this month, I am hoping AF comes sooner than later to shorten my cycles a bit.