6 days ago, I fell on my back and injured my left back muscle (latissimus dorsi) by landing on a hard edge. Naturally, that has caused the area to bruise. Movement is very limited since it hurts whenever i do anything. All this is understandable. I figure it will take time to heal since it was a pretty severe trauma.

However, what i am more concerned about is this really sharp stabbing/stinging pain i feel in my upper left buttock (gluteus minimus area i believe) whenever i move to certain positions...one of those positions being leaning forward diagonally to the right, while standing with legs straight....or sitting even. I can't bend far, perhaps about 10 inches or so before ZAP! Sometimes i have to touch the area just to make sure my skin didn't rapture from the sting. It feels like im being poked with a hot needle..or pinched hard with needle nose pliers - you get the idea.

That spot where it stings is sort of numb. Pressing on the spot doesn't reproduce the pain. Its on the same side as the back injury if that means anything.
In the beginning i thought they where related, the back pain and the buttock pain, and that i was getting the sting due to the back injury, but now im not sure since the pain in my buttock and the one on my back are independent. However, like i said earlier, it only hurts when i use my back muscles...or so it seems.

Any ideas what it might be?