first, just relax...I know when we FMQ we tend to grind our mouths as we move the fabric, our shoulders creep up, etc, etc...
here is what helps me...and my best friend who has crippling RA..get a paraffin wax spa...use it to heat/warm your hands before you start sewing...then make some hot rice bag mittens...to place your hands in while taking a break or at the end of the day.....it really does help!
I can not take any meds for pain or arthritis due to be banded, so I have to look for more natural ways to help ease the pain!
Keep on going, but know your limits each new day and do NOT go past them...even if you can only sew 15 minutes, then stop...wait til it eases off and try again..if you keep pushing, when you reach 50 you won't be quilting at all!