Suddenly Thinning Hair in Mid-30s

Two years ago I was getting my hair thinned out by my stylist because it was to thick. Two years later at age 37 my hair is considerably thinner. The thinning is more prevalent on the left top side of my head. The initial thinning was drastic and took place within a couple of months. Should I expect for this to continue at such a fast pace or will it slow down. My mother’s side of the family has little issues with hair loss while my father’s side does. Beside genetics what possible causes would be responsible for this to happen in the timeline it has?

First, I would want to map out your hair to see if this is symmetrical balding. At times, genetic hair loss is asymmetrical and will show miniaturization in the areas most impacted. Get to see a good doctor for an assessment. I can not help you over the Internet and would need to see you myself.