I don't believe in getting the little tyke's ears pierced. However, it isn't anyone's business other than yours, and I don't think it is such a terrible thing. I got hell for NOT getting my daughter's ears pierced (go figure!)
Will it scar her for life? Nah!
I want to wait till my daughter is old enough to WANT her ears pierced. The day she asks to get them pierced I will make an appointment and we'll go get them done. I kind of feel like doing them when they are really little is more about the mom than the baby (completely my opinion). For me, getting my ears pierced was a really special experience, kind of a "rite of passage" when i was 6 years old. I felt really "big" and "cool" to go in and sit in the chair to get my ears pierced, and I thought it was SO exciting to get to pick out my first pair of earrings, so I want my daughters to get the same.
BUT - you've already done it for your reasons, which is great. My daughters WILL probably be old enough to remember that it hurts, so there is a con I cannot argue with. You can't really back up and undo it- so don't sweat it! As with any parenting decision, trust me- if you did it the other way you'd get criticism for that too!
Good Luck!
-M.