I am a 63 year old, finger style, bassist who has played for 35 years. Lately I have been having pain in my right hand. I play right handed and I play every day. I play with two fingers. After a short time I get pain running down those two fingers from my hand. They feel loose, like they could full off. It can start after a half hour practice or at the end of a four set night. Any comments or suggestions?