Benefits of hair loss treatment for thinning parting caused by stress

I have been under extreme stress for the past few months due to having so many things to worry about, and now I lose a handful of hair every time I wash it. I can even see with my own eyes that the part at the crown of my head is thinning compared to before, so I am so upset that I have to use hair shadow to fill in the gaps whenever I go out. I have been diligently eating black beans and applying expensive scalp ampoules every day, but I feel hopeless because it doesn't seem to be of much help to my already weakened hair roots.
Ultimately, I am seriously looking into hair loss treatments at a dermatology clinic that strengthen hair roots by directly nourishing the scalp follicles.
I want to accurately fact-check the advantages of professional hair loss treatment at a clinic compared to simple home care before deciding on a hospital. Since the injections are administered densely into the scalp, I expect the pain to be significant; I am curious if the treatment clearly shows fine downy hairs enough to justify enduring that discomfort. Has anyone actually experienced a drastic reduction in the number of hairs falling out from the sink after visiting the clinic multiple times for treatment? I am firmly prepared to invest my time and money without hesitation to protect my precious hair, so I earnestly ask for your sincere advice.