TAILBONE pain from glute injection?!

[Kapytan83]

I had same pain on my 3rd shot into cycle, I was gonna take prior to gym but was doing legs so thought I'd do afterwards and did but think just coz my ass was so pumped and and solid from training that the juice just made its way up to path of least resistance. But yeah owwie didn't like that, lasted about 5 days, was painful but doubt it's anything to worry about..