Glute Pain

Hey lads,
I’ve got a bit of a pain in my ass. It runs the top of my left glute only…maybe my gluteus medius, but I’m not positive. I can go up and down stairs fine, but doing things like tying my shoes or crossing my left leg over my right is a bit tough. I took a week off and it felt fine, but back in the gym last week and its flared up again.

A strain? Indicative of a lower back problem? Rehab suggestions? I don’t have any more leg days this week, and have 9 days off starting Friday (going to Vietnam!). Any suggestions/advice appreciated.

Fair enough…any tests I can do for a self-diagnosis?