I was shocked three different times in my first trimester, each time it was the same as you I felt it from.my fingers to my elbow and once even up to my shoulder, (we had horrible electrical wiring in our old house) and I am 30 weeks and 3 days with a healthy baby boy :) I'm sure you'll be fine, as long as its not a full body shock. Shocking your arm it doesn't affect your abdomen. If you have further worries or issues call your Dr.
Thanks so much. That makes me feel much less worried. :)