Hair falling out

now my half of my hair is gone...its very thin and I can see my scalp in certain areas. I read on here its not a good idea to take vitamins but it seems like I really need them. I haven't started a cleanse yet bc im not sure what exactly to do. I think I will start out w/ buying bulk herbs and doing it that way. anyone else going through this? I also have a dr appointment set up to see if there is a medical issue like hypothyroidism causing the hair loss. I notice a bald patch in my eyebrows as well. Tweet