My hair falls out a lot when I wash it. Question about hair loss treatment.

Lately, the amount of hair falling out every time I wash it has increased, so I'm considering hair loss treatment.
I didn't think much of it before, but it's stressing me out because the volume at the crown of my head seems to have decreased and my scalp shows through in photos. Since hair loss shampoos and supplements haven't made much difference, I'm looking into medical procedures, but I'm confused because there are so many types.

I've noticed many people receive hair loss treatments such as scalp injections, exosomes, MTS, and medication. For those who have actually tried them, what were the results like? I'm also curious how many sessions are typically required to achieve high satisfaction. I'd like to know how much pain is involved during the procedure and whether I can resume my daily activities immediately.

And what I'm most curious about is the cost of hair loss treatments. Prices vary quite a bit from clinic to clinic, so what should I expect on average? I'm also wondering if consistent treatment is necessary to maintain the results. I would love to refer to actual reviews or recommendations for highly satisfying hair loss treatments!