Hi, I suffered from severe anxiety and panic attacks about five years ago, for about 2 years. For the past couple of years, I am on no meds, & experience no anxiety symptoms. However, I recently started getting pain in my neck glands below the chin, I feel tingly, shockwave-like sensations in my head, & my heart races. Similar to how I used to feel when getting panic attacks in the past. I had just started taking one-a-day metabolism supplements, & wondering if that could be a trigger factor, or do you believe this is a more serious problem? I am 29yrs old, 5' 3'' and about 135 lbs.