I had a horrible experience with sharing health information.
When I was diagnosed with Hepatitis C I fealt I should share the diagnosis with my employer, due to the type of work I was doing and because I planned to take the treatment and would be missing some work due to it.
Our HR department was headed up by a man that was on the board of directors of our local hospital, and he called them to get information about the disease (ease of transfer, prognosis, precautions etc.). He was referred to an ER doctor. He fealt compelled to share the fact that he had been asked very specific questions about hep C at my workplace with an ER nurse whos husband was my coworker and good friend.
She went home and warned her husband to be careful about blood spill if he encountered it, especially in the department I work in. He came to work the next day and shared his wifes warnings with me.
Within 24 hours of telling the first people in total confidence that they would not broadcast the information, I had a friend telling me that there was Hep C in my department.
I was never named, but it was a lesson learned and I never told anyone else outside my family after that. Even that was a mistake, within 6 months I was getting calls from cousins and other distant relatives that really had no reason to know.
Hep C is transferred in many ways, but the 2 that most people think are the only way to get it ( anal sex and needle sharing) are the only 2 common ways I can totally rule out. The first people ever diagnosed with it were war heroes that received blood transfusions with tainted blood. Until 1983 there was no way to screen for it in donated blood and that is a very likely source for my contact with the virus, that or my work as an EMT for ten years. I had to explain that to so many people I was thinking of printing a form letter and did create an email draft letter.
Similarly, most people think that PTSD is the result of either combat or rape/sexual abuse. If you were in the military, they will assume that was the source, if not, they will think you were raped or abused. Do you want to have to explain that event to everyone that asks about it? would you be comfortable explaining your chilhood abuse to people that really don't need to know about it? Would telling the story trigger you every time you had to recall it?
I havent told anyone but family and close friends about my PTSD, and I probably wouldn't have told anyone if it was a result of things I didn't feel comfortable talking about. I can easily just say "I lost a parent at 11" or "I saw alot while doing my EMT work", or "I was nearly killed by a drunk driver" (all true). I don't know if it would be as easy to share even general info about abuse or rape.
I would recommend keeping it to yourself, telling only people that need to know or are legally bound to keep your secret. And even then, prepare yourself for how fast the news spreads, and for explaining the reason you have been diagnosed.
Welcome, Deedlerock. This is a great place to ask questions like that, someone here has been through it if it is a part of being diagnosed with PTSD. I am so glad I found this place, so many helpful people here.