Friday, I Administered My Copaxone Injection To The Rotated Location

Friday, I administered my Copaxone injection to the rotated location of my arm. At the time of the injection I had a purple and black area develop about half way around my arm. Later in the day, the normal color came back and was fine when I went to bed. The next day a very large, dark "bruise" colored area had developed and some sensitivity. Today, two days later, the dark color remains and I occasionally have sharp shooting pains in the affected area. Not sure what to think of all of this. I have been using the medication for 2-3 years. I have had to be re-trained, if you will, with regard to the arm sites several times. What would you possibly suggest for some type of relief? Thank you for your input.