I don't know what your results mean but I've got (probable, based on antibodies) Graves' disease which is a common cause of overactive thyroid - I had no measurable TSH whatsoever, it's still low, and T4 was very high indeed. I had lots of symptoms but didn't get them checked out because I thought they were due to other things, we only found out during routine tests (I take a medication that can often cause under activity). Anyway my symptoms;
heart rate doubled and was a bit irregular, this can be a sign of overtraining and I was training for a marathon
I had a fairly constant feeling of apprehension
I had really terrible muscle soreness, especially in my thighs, I thought I was overdoing things. I've been a kind of sporty gym person all my life, I have horses etc, I'm used to muscle aches but this was something else
I lost weight, not a huge amount but it was mostly lean mass
I felt a bit 'high' and irritable, I have bipolar and my dr thought I was becoming mildly manic
Sometimes I couldn't get up, I was pinned down by fatigue
Eventually I couldn't even walk half a mile without stopping, having been comfortably running several times a week sometimes twice a day, up to 15 miles at a time - I felt very sorry for myself
It must be coming up to about 18 months since I started treatment for it and I'm feeling much much much better. It can take a while, the radioi iodine didn't work for me (because of a medication I take) but the carbimazole did and there are other options (like surgery). Good luck with the endocrinologist. There are some v knowledgeable people on here too.