I have been using juice for over three years now( on my sixth cycle now). I was doing a delt shot of prop ( on wk 9 now) and everything was fine during injection. I always cut my prop with cottonseed oil . No pain as usally but about 2 mins after the injection it got a rasied mark at the injection site , Looks look a bug bite. It a round and a little rasied not big at all. What would cause this to happen??