Last week i injected 1 cc sust and 2 cc of deca into each delt using 1.5" 21 gauge needle. My delts were so sore for the next 3 days, i could barely lift my arms. Now that the soreness has gone significantly since then, i went to the gym yesterday to do shoulders. As i was trying to do lateral raises, i felt a sharp pain in my left shoulder whereas my right one was fine. And i was wondering why only one shoulder would feel this way.... then i remembered that when i was breaking open the ampoules one of them did not break cleanly and there was a piece of glass inside the amp.... i looked at it carefully (under dim lighting though), and thought it would be fine to draw the oils in without a problem because the piece of glass looked too big to fit through the needle. Is it possible that i may have drawn up very small pieces of glass virtually invisible to the eye and injected them into myself?? CAn that explain the sharp feeling i have?? if so what can i do about it. My friend said that ampoule can't break into small enough pieces to be drawn up in the needle. Or did i just hit some nerve or something... is 1.5" needle too long to inject in delts? The most i can do right now is just wait to see if the sharp feeling goes away i guess. This has got me a little worried though. I'd appreciate any insight! .... eVo