I tried to inject in my left quad today but everytime I do so it the needle feels like its going to puncture something like I can feel it tightening when it goes in a little bit and the needle only goes in about 1/2 way i know i'm hitting the vast. lateralis muscle because I have enough detail on my legs to point it out and i'm not flexing the muscle when I iniject what do you think I could be hitting? And I haven't tried to force the needle through oh no. Any insight as to what i'm doing wrong or not doing at all?