I'm worried because I'm losing too much hair.

Since last year, I've been losing a lot of hair. Every time I wash my hair, I notice a handful falling out, which worries me. There's hardly any new hair growing back, and my part looks very dark, making it obvious that my forehead area is thinning, which is concerning. I've tried hair loss shampoos and other recommended shampoos, but they don't seem to make any difference. Should I visit a hair loss clinic?