I Have MS And Take 3 Shots Weekly Of Copaxone.

I have MS and take 3 shots weekly of Copaxone. Lately, after a shot I get shortness of breath, heavy chest, which goes away after a few minutes, followed by nausea and chills. This all lasts about a half an hour. Not sure if it's the meds, because I have been using it for over a year without symptoms. This is my third episode. I am also under a great deal of stress at work and mostly in my personal life. Not sure if this could be panic attacks or not.