dear ma'm regards! as you rightly suspected the symptoms that you have can be due to an under active thyroid
gland but you have not mentioned your thyroid profile neither you have cleared whether you are on thyroxine
replacement. the two nodules you talked of in your neck what are they? are they in the thyroid gland or in the neck. get a biopsy
(FNAC) of the nodules done and see your doctor with the reports. thanks!