I just started my period, I consulted all my books they all mostly talk about fertility and conception. One of them says to be concerned about milk supply if you start your period in the first six months but that is all it says.
My DS is 6 months old - I have a more than ample milk supply, in fact I had to work to get it down! My son feeds quite often and I don't see any problems with my supply up to now. I just assumed I would not be having my period because of this.
I just want to be prepared if I need to take steps to make sure I keep my supply up.