After using my thumb a bit it started to ache at the base joint. Is this normal from just overuse?

TheModernThumbScrew. That's a more common problem of Modern Man. Started with typewriters and got much worse with smart phones. It has been called "Blackberry Thumb," due to overuse of the thumbs using that small keypad. Skiers can get it if they fall grasping their poles. Some weight lifters can get it. It can get get real bad if you're not careful.Best to back-off for a while and use some Motrin. Taping helps too.