Hi momof21: I was diagnosed with Graves disease at 21, 6 months after having my daughter. It is the opposite of Hashimotos, as in they are both autoimmune, but Graves causes the thyroid to be overactive, where Hashimotos causes it to be underactive. Personally, when my thyroid is acting up, my TSH is low, and my T3 and T4 are high. Basically my body is not sending signals to my thyroid to produce more, because it's already overproducing. I was of the understanding that in Hashimotos, TSH (thyroid stimulating hormone) is higher because your body trying to get your thyroid to produce more, but your T3 and T4 are low.
With thyroid disease, whether overactive or underactive, you can have severe emotional symptoms as well as fatigue and just feeling like crap in general. When I was diagnosed, I went in for constant headaches and my doctor noticed an elevated pulse rate and asked about some other symptoms (which I attributed to stress at the time). He sent me in for a radioactive iodine uptake scan to diagnose the Graves. That was a long time ago, but I will tell you that the general physician I see now tried to tell me a couple years ago that my thyroid was underactive because my TSH was low, but I asked him to look at the T3 and T4, and explained to him that my TSH is always low when my thyroid is OVERactive. If I hadn't known this, they might have put me on medicine for hypothyroidism, making my hyperthyroidism even worse! Point being, doc ain't always right 100% of the time, and some know more than others about thyroid disease.
As someone VERY recently diagnosed with Type 1 diabetes, and who also has an autoimmune thyroid condition, it sounds very likely to me that your thyroid is the problem (whether under or over active is the real culprit). Your symptoms all point in that direction, and don't sound like diabetes. Someone else on here suggested to get the T3 and T4 numbers, and I 100% agree!!! Those will tell the whole story. If you are on medicine for an underactive thyroid, and it's really overactive, then you will never feel better!
Hope this helps, and good luck!
I would be interested to know what your T3 and T4 levels are