If you look at literature out there on the net, you'll find that dysautonomia is still pretty poorly understood. They are still trying to figure out about orthostatic intolerance issues such as P.O.T.S.. They try to put out fires with medications, hoping the medicine will alleviate your symptoms. They suggest things like eating more salt, wearing compression stockings, etc..
The best you can do (aside from leaning on the everlasting arms of the Great Physician if you belong to Him) is to go to those who are the best researched to get the latest thoughts on dysautonomia and treatment proposals (if you can manage to travel to them and get an appointment). People like Dr. Grubb and places like Vanderbilt, and I think Mayo are where a lot of people wind up going who are desperate for answers.
http://www.medhelp.org/tags/health_page/24603/Dysautonomia/Dysautonomia-Specialists?hp_id=717
I believe they tell you what their prescription for you would be and you are supposed to take it back to your local doctor from there to follow up on their recommendations.
For some, I don't believe there is an easy answer, and we learn to live with the changes in life style that come with orthostatic intolerance and other dysautonomia symptoms.
It kind of helps to have a community like this one, where you can see you are not isolated and alone in this dysfunction.
I will guess that the people jumping now and asking you often if you are okay will soon grow more accustomed to the new you and while still caring, become a little less jumpy. At least, that's the way it seemed to happen recently with my sibling. (I was diagnosed way back in 2004 with I.S.T. and then P.O.T.S. and typically, no one's jumpy about me at this point- I don't take medicine for it right now. My sibling was diagnosed with P.O.T.S. and N.C.S.- though fainting was not complete on tilt table- last year and still we get quite concerned at times.... sibling taking midodrine.)
May I suggest-what a blessing for you to have people surrounding you who apparently care about how you are with this dysfunction? A support system is important, so while you are learning to adjust and trying to cope with this, it might help to remember those jumpy people around you need to learn to adjust and cope with your condition as well.