Them fancy chords will do it to you every time. That's why I stick to A, E7 & D. So lay off the B flats and C#aug19thsdim47ths and dig out your capo for that gig. And 'stop practicing' when it hurts. Limit yourself to 'ten minute' practice sessions.
Oh! and lay off the coffee for a while 'cos that stimulates your nerve endings.