Please clarify one things for me to guide you correctly. When your doctor said your thyroid was little off, does that mean the main hormones- T3 and T4- were less like in hypothyroidism
or only the stimulating hormone of thyroid- TSH- was less. In the later case many people get the symptoms what you got and it is labelled as Hypokalemic periodic paralysis
. Please see an experienced Endocrinologist
and he/ she will guide you with help of blood tests including Serum sodium and serum potassium.
This is not something serious but needs proper investigation and treatment follow up and you would be fine with it. Let me know what your doctor says and if you have any other query. Take care.