I was walking back from the printer at work, and I get to my desk, and I experience like a fluttering in my upper stomach, it's kind of hard to explain, not even sure if fluttering would be the correct word. Anyway, I also felt like I was going to faint. Very odd feeling. I regained my composure. Also, my ears pop and crack when I swallow, and feel like maybe my allergies are bothering me. I do have anxiety, and have had panic attacks, but I do not remember having anything like this before. Has anyone else experienced anything like this, and do you know what it may be that would cause this.?