Is anxiety a symptom of hypothyroid as well as hyperthyroid? My Levo was upped to 50mcg 6 weeks ago, giving some improvement to symptoms. Yesterday I had an MRI and it was dreadful, as soon as I entered the machine I became extremely anxious and felt like I was going to have a panic attack! The anxiety has carried on ever since. Everytime someone at work asked me how my MRI went yesterday, I got teary! This is so unlike me, I'm normally really chilled and never stress. I've had 2 MRIs in the past and been fine.