Thanks everyone really appreciate it.
Ironically, the second injection I had my nurse friend do (before I realised this was more than a bruise) is completely fine!
That's right, if I hadve known I could've had bruise style large staining my answer would have been a 100% no. A pin prick sized stain is a whole new thing IMO. I am only in my early twenties too so would like it gone.
Think I will go to my other GP and have them confirm that it is what I think it is if it hasn't improved in a month or so.
Do I go straight down the compensation route first? Or go back to the GP and let them know I'm seriously unhappy and wanting to take it further?