If you have "true" orthostatic hypotension (a sustained decrease of >20/10 mmHg when upright), it may be the case that compression stockings alone aren't enough to ameliorate your symptoms. You and your doctor may need to work together through a process of trial and error to find the right combination of lifestyle changes and possibly medication(s) to find the best solution.
I say "true" orthostatic hypotension because there are many patients who have orthostatic intolerance (symptoms in the upright position) despite perhaps having a postural drop in BP that isn't substantial enough to meet the diagnostic criteria of 20/10 mmHg.
Here's the Mayo Clinic's treatment page from their article on OH which might give you a general idea of treatment options:
http://www.mayoclinic.com/health/orthostatic-hypotension/DS00997/DSECTION=treatments-and-drugs
Here's our (perpetual work-in-progress, pardon our dust) treatment page for dysautonomia in general—this is for all forms of dysautonomia, so of course many of these meds would not be appropriate for OH per se:
http://www.medhelp.org/health_pages/Neurological-Disorders/Dysautonomia-Treatments/show/171?cid=196
If you surf around the Mayo OH page and have any questions about other information on there (such as diagnostic tests that you have or haven't had), feel free to ask away. We have plenty more information.
Best,
-Heiferly.
Compression stockings has been a popular thread - Here is the link to it
http://www.medhelp.org/posts/Dysautonomia-Autonomic-Dysfunction/Compression-stockings/show/936330
Hopefully it will answer your questions. If not let us know :-)