Hi, I am new and this is my first post. I am 33 years old and have been told by dr's that I have panic disorder along with thyroid problems (hypothyroid). There are times that just doing a load of laundry or bending down to clean my daughter's room causes my heart to pound and my pulse to race. This then usually scares me and causes a full blown panic attack. My doctor just recently raised my dose of synthroid,and I wonder if that can bring on panic attacks? Has anyone felt like this before?? I sure hope so.