Anxiety attack? Please help

So im kinda freaking out right now but Im trying to keep my cool. I havent been feeling well these past few days. I have been feeling nauseous, fever, tummy aches, bad acid reflux, sore joints for the past few days. I have tmj so my jaw neck and shoulder have been kinda sore. Suddenly a few mins ago, I felt my right armpit and upper breast feel really tender and sore. I touch it and it hurts really bad. Then a few mins later, my neck went a little bit stiff and sore...I tried to shake it off and distract myself with the computer when all of a sudden I felt a cold/tingling shot go from my elbow to my hand but it wasnt the whole arm or all around it but I felt it on top of my arm and hand. It went away now but Im still kinda freaked out. I have been eating a lot of junk food and candy today. I also have a history of stress and anxiety problems. Any ideas?
(Note: Ive had an mri, 2 cat scans, xrays, ultrasound, ekg done this past year and everything came back fine)