Have you had a complete heart work up to make sure there are no issues?
That said, like AJWS6, I have a very low heart rate, most of the time, but I'm very active, and my cardiologist said that's okay, in my case, though there are instances in which a slow heart rate could be dangerous.
When I was really hypo, my HR often went into the low 30's at night with long intervals between beats (confirmed by Holter monitor). Now I stay mostly in the upper 50's/low 60's, except when exercising. I find that if I push myself to get my HR up higher, such as walking at a faster pace, I feel more energized, though I'm so used to having my HR be low, that it feels odd when it gets into the 70's.
Because of the other symptoms you list, I have to suspect that you are still somewhat hypo and either need an increase in your medication or a change.
It's unfortunate that you are only getting tested for TSH, because that's a pituitary hormone and doesn't really give a full picture; TSH fluctuates wildly for a variety of reasons, even intraday. You need to be tested for the actual thyroid hormones, which are Free T3 and Free T4; Free T4 is considered a "storage hormone" and must be converted to Free T3....... some of us have a "kink in the system" and don't convert properly, so we have to add a source of T3 medication. Having levels of FT3 and FT4 is the only to know for sure.
Can you get your doctor to test the Free T3 and Free T4, so you can get a better picture of what's going on? Many doctors refuse to test FT3 and FT4 and in so doing, their patients never do get well. I had to switch doctors because of that.
Often, once FT3 is properly adjusted, weight will come off (takes effort for some of us), which in turn eases the pressure/pain on joints/muscles. Exercise also helps; I actually rebuilt lost bone, with a program of calcium, magnesium and exercise. Magnesium also often helps with muscle/joint pain.
Because of your "0" energy and desire to sleep all the time, I'd strongly suggest that you ask to get vitamin B12 and vitamin D levels tested. Vitamin B12 deficiency can cause absolutely debilitating fatigue/exhaustion. I have to inject on a weekly basis in order to keep my levels high enough. If you don't spend much time outside, chances are pretty good that you will be deficient in vitamin D, as well.
Hi, sorry your experiencing discomfort. I've alway's had a slow heart rate and low bp, majority of my life, even prior to thyroid disorder, my heart rate is usually between 50-60 bpm, at rest it can get down to 40bpm, sometimes high 30's,. My Caridologist shared, reason being I have a very healthy heart. A heart of an athelete. Even now without a thyroid, my vitals were 55bpm, 116/66 bp yesterday at Endo visit, with TSH of .99,. If my heart rate goes over 70bpm, I'm palpitating :)
I feel mild fatigue occassionally, from sleep deprivation. Best to address your concerns with Primary, Endo or Cardiologist for peace of mind, pertaining to your heart rate. Feel better soon.