Hello @marioncole, Welcome to Connect, an online community where patients and caregivers share their experiences, find support and exchange information with others. We are patients like yourself and can only share our personal experiences. I have no medical background or experience but you have some very good questions that it would be best to discuss with your doctor or health care team if you have one.

Here are a few articles that may help you learn a little more about thyroid and platelet levels.
-- Interpreting Thyroid Levels Tests: https://www.healthline.com/health/optimal-thyroid-levels
-- Platelet Count: https://labtestsonline.org/tests/platelet-count

Are you able to discuss your medications with your doctor or pharmacist to see if they may have an interaction with your hormone therapy, if that was your question?