I have to admit I am suspecting the same thing myself. I am in the same boat as you are, only just 53 years old and my platelet count was 1700. Healthy, exercise, eat very well. I also suspected being on multiple blood pressure medications starting in my 20's. Several in my family have that problem though, and no one else has developed ET. I'm told to not travel for work until the platelets drop below 1000. They are on the way down, but not there yet. I'm just a month into this taking Hydroxyurea and, cross my fingers, no side effects yet. The Hema. Dr. told me I can continue bicycling, but make sure I stay hydrated all the time. I'm afraid to go out alone in fear of being away from everyone and having a stroke, so I stick with the basement spinner bike now and weights.

Realized 2 years later after taking covid vaccination my platelets were high and now taking blood work to determine the causes
They were never high until after took vaccination taking asprin now sent to cancer center to take blood work she said the results didn't show anything but showed my iron level high. Now I am scheduled to take more blood work platelets in the high nor 900,000. Scared every day for my life. Healthy person and all blood work prior to vaccination were normal 64 years old woman. Feel fine just not as much energy but think thats about being worried.

Thanks for sharing makes me feel better to k ow someone else has the same problem and still living. Been so stressed loss my husband 4 yes ago and my mom 9 months ago juste and my daughters and would hate for something bad to happen. I'm in missouri what state are you in?