HAIR LOSS AFTER PREGNANCY IS VERY HIGH

hi
after pregnancy my hairs are lossing in high quantity. every time i
touch my hairs with hands they come in my hands. before pregnancy they
were good.i have straight and black hairs. but now they are thin and
lossing.i changed my shampoo too as all beautisions said that "nioxin"
is best for hair loss. i do use conditioner and hair strength
conditioner which is also nioxin. but it doesn't control lossing. i'm
breast feeding my baby.
i need a advice to control my hair loss.
thanks in advance