Familial dysautonomia is a very different disease than the non-familial dysautonomias. It is present from birth, and life-threatening. Both parents would have to pass on the gene. I think reading this description should clear up any confusion:
http://www.medhelp.org/medical-information/show/444/Riley-Day-syndrome
When you say you are on "seratonin uptake," do you mean you are on an SSRI, a selective serotonin reuptake inhibitor, or something else?
Tingling sensations may be indicative of problems with small nerve fibers, which isn't uncommon in dysautonomia. You may want to ask your doctor about small fiber neuropathy.
http://www.medhelp.org/medical-information/show/74/Peripheral-neuropathy
Some people find a reduction in the fatigue from dysautonomia with treatments such as florinef(fludrocortisone) and/or midodrine. Using Ritalin as a vasoconstrictor rather than midodrine may have the added benefit of increasing alertness.
Some people who prefer to stay away from medications or can't tolerate them try licorice (in lieu of florinef):
http://www.nlm.nih.gov/medlineplus/druginfo/natural/patient-licorice.html
It should ideally should be used under the supervision of a doctor/alternative medicine practitioner to get the dosing correct as it will increase water retention and blood pressure. (Note that some forms sold have the active ingredient removed, and thus would be rendered ineffective for medical purposes.)
If you haven't had bloodwork lately, it may be worthwhile to have your electrolytes checked and also possibly be checked for thyroid problems and anemia, as any of these imbalances can worsen fatigue with dysautonomia.