i had a similar experience recently but not a virgin glute since i've been on hrt for 5 months...usually alternate between right and left cheek but been going right lately cuz easier and pressed for time but Tuesday i went left and felt a twinge when going in then aspirate and inject fine no blood but felt sore for (like bruised feeling but no black/blue around site) like 2-3 days and was the first time with any probs whatsoever