oHi thanks for your question.
You have thyroid
is incomplete statement.Everybody has thyroid and thyroid is very vital for life.What I can guess from your symptoms is you are hypothyroid which means your thyroid gland produce less thyroid hormone.Hypothyroid can cause increase in weight and menorrhagia
that is irregular periods
along with many more symptoms.I would suggest you to repeat your TSH
,T3 ,T4 levels and if TSH levels are high and T3,T4 levels are less,you hypothyroid.I would suggests you to consult a physician who will be able to treat your hypothyroid state.
Hope this answers your question.