Help with Hair Loss

I have recently noticed that my hair has been dropping, especially after my shower. I am not sure if it is because my hair is at the longest it has ever been or whether it is my shampoo which is an Italian salon brand recommended by my hairdresser. When I consulted him on this problem, he told me that it may not be the shampoo but could instead be related to other issues such as stress or lack of sleep! I did not even know that these factors could contribute to dropping hair!

It got me quite worried at one point as my hair would actually come out in fistfuls when I washed it. It was especially bad after I had a swim so perhaps it was related to chlorine as well! So for once, this is not a review. Instead I am hoping that others could help provide me with reviews of products they have used to stop their dropping hair before I find myself signing up for a hair treatment course with a new york mail hair transplant doctor!