it does sound to me that you very well may be suffering from hypothyroidism or at least a sluggish thyroid but it cannot be known for sure without more test results. what tests did your doctor run exactly? if he suspects it may by a thyroid issue he definitely should have ran a tsh free t3 and free t4 test at very least as well as some other tests that may will greatly improve the chances of diagnosing this correctly. without them it is hard to say because hypothyroidism can have overlapping symptoms with other disorders many of which can also be discovered through a comprehensive hormone test. i strongly recommend you getting one done if your doctor has not already.
hypothyroidism. i just had my blood works done and my doctor saw that my calcium levels are slightly above my normal range. my potassium has been low for quite some time now as well. for the past 5 to 6 years i have been feeling tired intermittently. i don't sleep well and when i wake up (even with 8 hours of sleep) i don't feel rested. also i've noticed that i've been having low-grade fever. i seem to be more sensitive to cold weather. i noticed also that i can feel some hot areas on my skin.