I had the same happen after having my DD2. First five or six AFs were so hellish that I thought about going for a hormonal contraceptive (previously sworn off!) to see if it helped. This last one has been totally bearable though, she's 19 months, so I think it's maybe my 6th or 7th cycle? I don't know whether time has been a healer or... my other totally crazy theory... it's an epic amount of junk food I've been having over the last month. (crayzeeee, right?) I'm usually a pretty "clean" eater, but this last cycle I stayed with my MIL, who worships canned, frozen and otherwise preserved food, and who I think is trying to fatten me up. I don't think I'll try it again though.