So I took my third injection today in my left quad. The two previous injections (done over the past week) were also in the quads.
When I put the needle in, it seemed to hurt a lot more than the other injections, even when the needle was 75% of the way in. On the other two, it stung for the first third, and then painless for the rest of the jab.
I injected, felt fine while I was doing it. Then when i pulled the needle out, a spot of blood appeared in the injection site. The other two injections were bloodless.
Did I nick a vein or something?