I too have the same problem except my pain is right on the side of the hip and when it hurts even just touching the area is awful, also when i have been sitting for a while or going up stairs is painful too.
I Cant squat at all at the moment and i have just been using the leg press which has been bearable, but i also dropped deadlifting out this week as it aggravated it last time.
It guts me as the 2 power moves that i really want in my routine are problematic, and my back routine today felt lacking without any big deads in it!
Rachfit, when you say a professional, are you referring to a physio? Or a biomechanics coach?
I did foam roll my hip the other day after legs and i must admit it did help once my eyes stopped watering and the screams subsided!!!
"When you can't see the angles no more, you're in trouble." My Journal