I've trouble with thinning hair as well because I've fine hair. If your hair is falling out, it's hormonal. A few years ago I was taking a food suppressant pill. OMG, after I stopped, my hair was falling out like crazy. I got so scared and saw my doctor. I was put on birth control and after a few weeks, my hair stopped falling. So scary...
My hair dresser recommend taking biotin. I recommend taking the vitamins and getting a biotin shampoo. Just make sure your shampoo doesn't have alcohol in it because my sister was using this Hmong shampoo for hair loss and it has alcohol as the first ingredients. Just be careful and do your research.