I have irregular menstrual cycles. If its regular for 4 months, 5th month i don t get my period. Also my thyroid gland in enlarged, Although my T3, t4 and tsh levels are normal. I got an FNAC done, it says few colloid goiter. Is there any medications necessary ? I am 5 7 and weigh 82 kgs. Please let me know what is the problem ?