Hair loss after stopping birth control pills.

I stopped using birth control pills a little over a year ago, and as a result of that my hair loss has been very scary. I went from a nice hidrated manageable full hair that was below my shoulders to dry unmanageable and very thin that's fading away and not even growing any more. I take my daily prenatal vitamins that I have been taking since before my five year old was born, and yes I take biotin too. Nothing is helping. Seems like I need a pill with nothing but estrogen in it to fix my hair and bring it back to life it once had 😢.