Thyroid Medicine increase question

[JSmig]

Hi-

I have a quick question. My medicine was increased from 50mcg to 75 mcg in January.  I should have started my period on Monday. I have a very regular cycle in that I can always count on my start date to be consistent.  So here I am 3 days late...which I think is related to my increase in medicine but I'm not sure. So...anyone have an answer? Is it my meds? Should I be prepared to start late? Skip this month?  I never had an issue with 50mcg so this is throwing me off and I didn't see it as a side effect anywhere. My new endo doctor didn't give me any definite answers.  In the back of my mind, I do wonder if it's that or if I'm pregnant (which wouldn't be the worst thing but definitely a shock to us at our age!)

[JSmig]

Thanks for the info.  No need for a pregnancy test....I had that friendly visitor this morning!  I did find information after I posted this that the brand I have been on can cause menstural cycle problems but normally shortened time and delayed.

I am 41 almost 42.  The women in my family on both sides haven't had menopause or perimenopause at all before 50 but you are right, it is a chance!

Thanks for the reply.

[goolarra]

I'd do a pregnancy test.

Disturbance in menstrual cycle isn't unusual when starting or increasing meds.  The whole endocrine system has to rebalance.  We all react differently, so it's impossible to say if you will skip or just be a little late.  

You mention your age.  Could you be in perimenopause?  My cycle was like yours...regular as rain...until about 10 years before menopause, when it started to vary.