Hoping - no offense taken :-))
But yes, I know what you mean......
You have to have a license to fish, drive, hunt, fly, dive,..... but any idiot can become a parent....
Kaprovea -
I am sure you did the shot fine. Sometimes bruising happens, especially if you get a dull needle, or inject it too slowly or at an odd angle.
I gave myself a bruise this morning as I was in a big hurry to do it (got up late, and late getting out the door for work....)
A little bit of an ice pack will make it feel better :-))