I too am pleased to hear that getting AF so soon after birth is not unheard of... I heard lots about not getting it back for months and months especially if breastfeeding. My lochia stopped at about 2 weeks and AF came on day 29 (my usual cycle) - Initially I thought it was lochia returning, but it was bright red and very heavy with bad cramps and back pain... Hopefully the cramps aren't an ongoing thing with AF, I never used to have them pre-pregnancy. I am breastfeeding and thought It was a sure thing not to get AF back for a year or so!