We did a Fri. & Sat. this weekend. Friday I noticed my fingertips getting numb during a few songs in which my guitar player likes to do long solos. Tonight, during the first set (of 3) it seemed to be getting worse. 2 more hours of playing didn't help things either. I play hard, but I've never noticed this before. I'm just recovering from a cold; could circulation be affected by that? Anyone had this problem?