both the pinkie and thumb on my right and left hand pop every now and then just from normal movements, there's no pain or weakness, i looked at something called "trigger finger", something that musicians tend to get, but if it were that, i'd feel some kind of pain X.X

is this common amongst any of you? anything to worry about? X.X
It could just be ordinary bones popping, like when you stretch. I would think that you should at least stretch a little before you practice, or just go to a doctor and have it checked out.