Levothyroxine and Longer Menstrual Bleeds/Periods

[HealthStarDust]

So far as I have been increasing my dose (still optimising dose) my periods length have stayed the same around 5/6 ish days. The cycle itself has varied since starting levothyroxine by an about a few days (from a 26 day cycle prediagnosis and treatment to 26-31 days since diagnosis and treatment).

However, this time I have had a period (albeit light) for 2 weeks and counting which coincides with my latest dose increase (75mcg 1 day followed by 100mcg the next day following this alternating pattern).

Everything I have read from others experiences suggests periods stop, or become irregular (which to me means a longer cycle).

So, my question is this: is having longer periods normal? If not, any suggestions?

I’m trying not to worry so I’d be grateful if anyone can share their knowledge on this.