I have very little fat on the tops of my legs so when I inject my Humira into the top of my legs it always feels like it is going into muscle instead of just below the skin, even if I try to squeeze my skin together. I don't think Humira is supposed to be intramuscular, so was wondering if anyone thinks that is an issue, or experiences the same? Should I only be injecting into my abdomen and avoiding my thighs?