I'm new to the game, I'm on my 3rd shot. I heard the thigh hurts, so I'm currently doing it in my buttox. the 1st shot was on the right cheek, 2nd on my left, and 3rd on my right. so I plan on alternating right to left. I'm injecting sun, tues, and thurs. On my 3rd shot, when i pulled out, it...