Hypothyroidism does upset the menstrual cycle and you might need a T4/T3 combination. The usual complaint is very heavy bleeding but as you've been on the pill for years your dose of levothyroxine might not be sufficient yet for you to be 'normal' Your TSH is too high and should be around 1 or lower.
The goal of Levothyroxine is to restore the patient to euthyroid status. For most patients that will be when TSH is 1.0 or lower with FT4 in the upper range. FT4 needs to be in the upper range in order that sufficient T3 is converted. Read Treatment Options in thyroiduk.org.uk/tuk/about_... Email louise.roberts@thyroiduk.org.uk if you would like a copy of the Pulse article to show your GP.
Hypothyroidism can disrupt menstrual cycle. Normal cycle will usually resume once you are optimally medicated on Levothyroxine.
Content on HealthUnlocked does not replace the relationship between you and doctors or other healthcare professionals nor the advice you receive from them.
Never delay seeking advice or dialling emergency services because of something that you have read on HealthUnlocked.