Hi!! I was just at the Dr 2 weeks or so ago for this. Ease off of the heavy lifting and also the high impact for a bit, especially the lateral movement. She gave me some painkillers for when its really bad, but I'm trying not to take them unless its interfering w/ my sleep, which some nights it does. Other than that, it really just needs to be stretched out. I've added a bit more butt/hamstring stretches to the end of my workouts. It was starting to pull at my hamstring as well - compensating for the weakness in my butt. The stretch that has made the most difference for me is lying on my back and crossing the leg of the sore butt over the other knee and bringing them both up. I think Cathe does this in KPC and LG if you don't know what I mean. Massage and the tennis ball/foam roller thing work really well too. Oddly enough the stretches and massages that are the most uncomfortable to do seem to be helping most in my case. That said, don't do it to the point of overwhelming pain, either. My Dr said normally takes 1-2 months to clear up, and it may flare up again from time to time. Said if I want I can go to PT for ultrasound or electrostimulation, but I think I am going to see if I can wait it out. Good luck, and hope you're feel better. A sore booty is no good!!!
Nan