Hello
It points towards an autoimmune
thyroid disease which will cause your thyroid gland to function lesser than normal
Do full thyroid function tests if not done -
TSH , Free T 4 and T 3
If there is any swelling in neck requires a ultrasound of your neck
Next Steps
Do blood tests as recommended
Post which consult your doctor for medications to manage the same
Would recommend to also check for your hemoglobin ,
kidney functions and blood pressure during next next visit