Does Withdrawal From Levothyroxine Cause Anxiety And Panic Attacks?

Does withdrawal from levothyroxine cause anxiety and panic attacks, or are the withdrawal symptoms I m experiencing solely from taking too high of a dose of WP thyroid (natural porcine thyroid med)? I am a 57 year old Caucasian female. My doctor is on vacation, which is why I m reaching out to you. I took levothyroxine for approx. 30 years, but when I started going through menopause, I started feeling very horrible. I went to a naturopath and she said I might feel better on natural thyroid. She started me on 1 grain. I took it for 18 days. After the first week, I could tell I was over medicated. I was terribly anxious, my body was vibrating, I couldn t sleep, I was having panic atttacks, and felt generally unwell. A blood test confirmed that my levels of T3 were too high..My doctor advised me to go off the WP Thyroid for a week before starting a lower dose. I want to make sure I m not going to have a heart attack, stroke, or go into a coma due to stopping all thyroid meds so suddenly. Can you help me? YYYY@YYYY