Today I will be shooting my second test shot. The other day when I did it it seemed like when I pulled back, the thing that you pull back on really wanted to go the opposite direction, like a rubber band effect almost. Also when I aspirated it to check for blood in my glutes, it did the same thing. Am I doing something wrong? I use 22g x 1.5" needles with a 3cc syringe. I get all of the air bubbles out before injecting except for those tiny ones you can hardly see. thanks.