Something else I just thought of...
Super sensitive to Benadryl (take at bedtime for itchy skin) - one pill knocks me out as well has sesitive to anesthesia. 3 seperate occasions - it took me longer than "usual" to wake up from it. So much longer the doctors were rather concerned about it.
Very difficult to respond without knowing what tests have been done and what the results were. Hopefully you have been tested for free T3 ( which is the most important thyroid test, followed by free T4 and then TSH. I'd bet that is not the case however, based on all our experiences. With all your symptoms, obviously something isn't right , so I suggest that you get somebody to do the checks I mentioned above as a starting point. You can also do some checking yourself by checking your body temperature numerous times over the span of several days and comparing the average to the optimal of 98.6. Averages lower than 98.6 indicate low metabolism/ low thyroid, even though most doctors will not acknowledge the usefulness of this test. If this interests you, here is a good reference.
All my levels are "normal" but they haven't checked the antibodies. TSH 1.69 uU/mL, T3 108 ng/dL, T4 7.0 ug/dL, Free T4 1.4 ng/dL, Free T4 Index 6.5, T4 Uptake 1.07
My body temp is always around 97.2, the other day it was 96.4...
My endo did tell me it was Hashimoto's based off my ultrasound and biopsy results. He just doesn't want to treat it with meds because the levels are "normal". I was going to discuss the option of treating it with my primary, at least trying something to see if my symptoms settle down some.
I think you are missing one more thyroid test, which just happens to be the most important one--free T3. For someone with Hashi's, and with your symptoms, and your low temperature, I would want to see free T3 in the upper part of the range. That's because it is the most active component of thyroid and the one which largely regulates metabolism.
I will ask him about running that one too then.
Thanks for your input!
Many of your symptoms do sound like POTS. My daughter has it and was diagnosed with a tilt table test. One thing you can do is take your blood pressure/pulse readings three separate times: Laying down, then sitting up (with legs hanging off bed) and finally standing. POTS pulse rate goes up 30 bpm from sitting to standing.
There is a doctor who has done lots of research about POTS and has some articles that are very helpful. His name is Dr. Blair Grubb and his articles may help shed some light.
It's so hard because so many symptoms are related to many different problems. Incidentally my daughter and I both have low body temperature (as does my mom) and I have often wondered if there is anything to that. I believe all three of us have Postural Orthostatic Tachycardia Syndrome.
Best of luck to you!