Hair loss treatment

I'm really worried about hair loss right now...ㅠㅠ

I'm the only one in the family with no hair.

I used to have thick hair until my 30s because my family has a lot of hair, but the stress at work was intense. Starting in my late 30s, I began to get gray hair, and as I dyed it, my hair became damaged and thin, leading to a decrease in hair volume. Now, even tying my hair with a regular hair tie three times leaves it slightly loose. For the past 2-3 years, I've been taking brewer's yeast and biotin supplements. I heard that using Dove soap from the US instead of shampoo at night is good, so I wash my hair with that, but there's no improvement. Is hospital treatment really the only option? My friend said the costs are no joke.