hair loss is normal after having a baby, but as you say you have bald patches you need to go to the doctor i dont mean to worry you but i had alopica and lost all my hair after i had my little boy, this is rare so please dont worry, the doctor can send you to a specialist who can try all sorts of treatments. my hair has no grown back so its not the end of the world if it is alopica. also try zinc tablets these help the immune system which can aid hair growth x