You mention that your heart rate and swelling are improving with treatment. Are you taking methimazole now? After I started on methimazole, I was starting to feel better after only a few weeks. I had several symptoms (tremors, weight loss, weakness, eyelid retraction, etc.) but the most challenging one for me was the anxiety and heightened emotions.
I was diagnosed almost five years ago after having experienced symptoms for about a year. Even though my symptoms cleared up relatively quickly, it took longer for me to become euthyroid. I was on methimazole for four years, and last year they found a large tumor. It had gone unnoticed because I'd gained back all the weight I'd lost while hyperthyroid (some of it in my neck) and the nodule was growing at the bottom of my left lobe and extended past my collar bone, so it was well hidden.
I had a total thyroidectomy nine months ago, and pathology determined that my tumor was benign - a Hurthle Cell Adenoma. I started on levothyroxine a week later. I've been on the same dose of levothyroxine until recently. Over the summer, I got a blood test that showed I had become hyperthyroid. I was starting to really feel the symptoms when I finally got in to see my endocrinologist, and she lowered my dose.
Here's an excerpt from my post to facebook on the day of my endo appointment, explaining how and why I felt so bad. (Note - I also had a migraine that day).
“…Migraines can be triggered by the type of weather that we've had for the last three days. Also, hyperthyroidism can make you feel anxious and depressed, so even the smallest annoyances piss you off and big annoyances make you want to cry. Every obstacle seems insurmountable. For example, yesterday when the plumber was having trouble getting my drains unclogged (tree roots) it seemed to me that my best course of action would be to put all my belongings in storage and burn down my house.
This was written just two weeks ago. Now I'm reading it, and it's hard to believe I felt this way. I feel so much better now after just a little reduction in my medication. The idea of burning down my house is ridiculous now, but I felt so trapped and hopeless at the time.
I think that, with a little time, you'll look back and won't believe that you actually considered dropping out of school. Just hang on - things will get better soon.
Because of my near-cancer experience, I've done a lot of reading online about it. The first thing you need to keep in mind is that 95% of nodules are not cancer. I've read this statistic again and again, even though some of the other things I've read seem to contradict each other. (Some of the info may have been out of date). When I was first diagnosed, I had a thyroid uptake and scan, and there was definitely no nodule back then. I know that I must have had it for at least a year, though, because I found a photo that shows it. The photo was taken a year before my nodule was found, but it's only visible because I was leaning over.
If you're truly concerned about cancer, then thyroidectomy may be something you should consider after the methimazole has a chance to clear your head. I was very happy with mine. Recovery took a couple of weeks and I didn't need to go into isolation (as is required with RAI). I think that one levothyroxine dosage adjustment in 9 months is pretty good. You would just need to make sure you find a really good surgeon.