I injected myself in my left delt about 3 wks ago with some home made fina and ever since then I've had a lot of pain in my delt (I've injected the fina in my other delt and glutes too with no problem so I don't see that it could be the fina). Its an intense burning when i do any sort of movement that puts stress on my shoulder area. Some of my friends in the gym think I may have hit a tendon, but the burning makes me wonder if I hit a nerve. Anyone with any experience with this and what to do to heal it?