I switched to a hair loss shampoo, but it seems like I'm losing more hair.

Ever since I switched shampoos, I feel like the hair falling out is more noticeable when I wash my hair 😥

It is difficult for me to tell on my own whether the product doesn't suit me or if my hair is falling out because it was bound to fall out anyway.

At times like this, I'm wondering if I should even continue using the shampoo. When hair loss is suspected, would it be better to check the condition of my scalp or the cause first rather than switching products?