when did your period return after delivery ? and we're you strictly breast feeding? or doing both milk and formula? I was just curious. I primarily breast feed and give formula when she's gone at her grandma and grandpa's for the day. (she eats so much I have no time to pump any more). my doctor told me at my 6 week check that my period would probably return sooner because I am feeding her formula as well...but it's been almost 3 months and hasn't returned yet.