hey i hv irregular and short menstrual periods recently,,i did the blood tests for fsh ,lh,tshetc ..and it was found that i hav high tsh level which indicates hypothyroidism ..i have started taking meds from today..doc told me that i also have PCOD ..my weigt is 70 kgs,,ht-5.2 ..i want to knw whether i hv to take the thyroid medicine throughout my life?????recently i am having fast heart beats...is it occuring due to hypothyroidism??