Rhogam Shot

How bad is getting this? I’m getting my first one on Tuesday. It’s a butt shot right? Or does it get to be administered in another location?

Edited to add: It’s just the fact that I’ve heard it goes in the butt. Never had something in that location before and mentally it kind of freaks me out (although I’ve had a spinal injection and get allergy arm injections). So trust me, it’s not the shot part, but the location. In general shots don’t freak me out and I don’t mind them a bit. But again, never had one down there so totally new experience for me