Give your body sometime to get back into the swing of things hon. Mine have been 1 -2 weeks over on and off since I stopped BF tank over a year ago and only just getting back into my normal 28-30 day range now.

You could also be getting into sync with another female around you...funny thing is....I know of a few girls who are close to me and we have all gotten AF this last week...(start Twlight zone intro music)