Ok I am doing my ED inject Masteron/Tren/Prop. I swab, stick, aspirate, and inject. Near the end of the injection it starts stinging extremely bad so I slow down and feel pressure against the plunger, blood actually starts to go into the syringe so I pulled it out. Very painful for a couple of minutes. Must of hit a vien but it did not show up on aspiration. Did not realize how painful that could be. Fine for now thou. This happen to anyone else?