it is probably your thyroid gland that is playing tricks on you i had hair loss and it turned out to be my thyroid it was overactive at first but now it is underactive it can happen quite a lot after being pregnant as your hormones are all over the place. if you go doctors ask him for a thyroid blood test to check your levelscheck out about thyroid.com it has some useful info on there it is probably just a phase and will resolve its self but if not there is treatment so dont worry