I have the same problem with hair loss. I had to cut it real short to make it look a little thicker and to take off some of its weight since for me the lighter it is the less it falls out.
I tried several medications, tonics, shampoos, scalp massages but no tangible results.
What I do now is make sure its clean, I try not to brush it so much and I never color it because that also adds to the problem.
When I have to dress up for occasions/weddings etc I use clip in extensions that match my hair color. They look natural and work very well.
Since my major problem is on the front part of my head, I like to use
these clip in bangs. Saves time and you don't have to blow dry/cut your own hair.
Good luck