Irregular periods are common when
thyroid levels are changing, and
TSH dropping from 11 to 2 is a big shift that can affect your cycle for a few months until it settles. A negative urine test done right after a missed period is usually reliable, especially since you're not trying to conceive.
Next Steps
If your period still hasn't started in another week, repeat the urine test to be sure. Keep taking your
thyroid medicine as prescribed, and mention the irregular cycles at your next thyroid review.
Health Tips
See a gynaecologist if the delay crosses 3 to 4 weeks, or if you notice unusual pain or bleeding.