Well you put forth a complex set of information and questions above !
First >don't worry about getting cancer from your CT scans.. not that much radiation so relax on that one...
I think that you should consult #1 a NEUROLOGIST
>> the POTS could tie into autonomic neurological dysfunction... the tingling and visual distrubances could tie in potentially with COMPLEX MIGRAINES >> these are migraines with neurological symptoms.. so IF that should be the case with you then your migraines SHOULD NOT BE TREATED with a TRYTAN type medication such as Immitrex/ Maxalt/ Zomig ? etc..
You may have benefit to be on a migraine preventative sucha s Topamax/ Elavil / Inderal
You need further work up with a neurologist thopugh is the bot***** *****ne.. they would start with revirewing your history adn symptoms>> then physical exam >> then consider perhaps supportive tests as they may feel necessry ( MRI of brain may be considered)
#2 Endocrinologist to follow the Hashimoto's thyroiditis> that is an autoimmune disease but it may dfor a time hyper-stimulate the abnormal release of thyroid hormone but in the end you will probably have a burned out thyroid and hypothyroidism which will need treatment.. You need to be monitored for this condition ( IT may be reasn behind some symptoms asuchas feeling shaky and tachycardia )
I agree with visual symptoms that seeing an ophthalmologist is a good idea too >> the symptoms could be ocular migraines in part here however...
Too much thyroid hormone may cause IBS symptoms as well...BTW...
I hope that this information is helpful for you. Let me know if you have further questions. I will be happy to get back with you. If my answers have been helpful and to your satisfaction then please remember to leave positive feedback. Thank You and Best Regards,
Anthony Bray MD