I should have worn my cutting glove when I was cleaning out a can. I probably cut it in the same place you did - right on the knuckle. My husband told me to go to the ER. So after 2 1/2 hour wait, it took the doctor less than 5 minutes to put in 5 stitches. The shot is no more painful than slicing your thumb open!!!! I now tell everyone I have a "franken"thumb when I show them the stitches. Just make sure you take care of it, polysporin every day with new bandages. You should be able to start sewing again in a few days. Just keep your thumb covered! Hope you eal fast.