Natural shampoos symptoms and conditions

Help me! I have stopped taking Yasmin for about 4 or 5 months because my husband and I want to conceive. I AM STARTING TO LOSE MY HAIR! I am so worried about this as I am losing at least double the normal amount everyday and this has been happening for about a week now. I have noticed the difference as my hair is not very thick. My husband has noticed. My friend says she can't tell, but if you look in my bathroom and my comb you would think I was undertaking radiotherapy. I went to my doctor two days ago and she thinks it could be thyroid or iron problems. She thinks it could be ceasing the pill but is unsure......PLEASE, is there ANYONE who has experienced this? And if so will it stop? I am so distressed about it.