I'm almost done with my 6 week prop/tren cycle and loving it. However, I had an injection issue today that has never happened before. When trying to inject into my right pec, which I've done several times, it seemed like the plunger really didn't want to go down. I spun the needle so I could see the markings on it to see if the plunger was going down at all, tried again and got a pain in my chest and down my tricep to my elbow. Decided to wrap it up and I'll try again later (I didn't inject). It feels fine now, no different than a typical injection. Did I hit something?