Hi Zoi! Thank you for your question and welcome to HCM.
First, I am glad that your procedure went well and that you have been compliant with your prescribed medications.
To answer your question, I would defer from taking Ativan for the moment. It is possible that your symptoms may be caused by
Synthroid which, as you very well said, acts like the normal
thyroid hormone.
I advise that you consult your
endocrinologist. Let him/her know of your symptoms and examinations and some blood tests may be run. If your thyroid hormone levels are above normal, the dose that you are currently taking needs to be tapered down a bit. You must understand that your body is still adjusting to the
hormonal changes that your
pituitary gland monitors and controls so you have to be extra vigilant of unusual symptoms such as these. As such, your medications and their effects will need to be monitored as well. If your thyroid hormone levels are within the normal range, then ask him/her about the need for Ativan.
I hope I was able to address your concerns. If you have further questions, please do not hesitate to ask me.
Take care!
Dr. Galera