My first cycle I only injected into the glutes...and knew nothing of aspirating and I never did it. This time around I'm pinning different locations and I'm trying to aspirate, but I'm having a really difficult time doing it. How hard do you have to pull back?? WTF! It's seems especially hard with one hand and the needle is moving all over the place while I'm trying to do it. I'm starting to get frustrated and just wanna say screw it! But I know that's a mistake. Any suggestions?