Poor Right Hand

All I did today was take dad to his car that was getting fixed and run to the store for dinner stuff.  I nearly got everything ready. Ham, mashed potatoes, gravy, and cream of corn.  Then I decide to finish up by feeding the dog in between serving food on table.   I open the can food try to take the top off then SLIP AND SLICE. My ring finger was cut pretty deep, thumb was next to deep, and the middle finger got nicked a bit but still hurts to use....my right hand and wrist are falling apart!!!  First carpal tunnel, so I can't lift things as well, and now this. I hope I spelled that right...lol