Can I use a nipple shield to teach my baby to latch?

Br

My son will be 3 weeks old soon, and he latches amazingly on my left breast. On my right, however, he can't get a deep latch and he chomps. This is so painful. I'm nursing him without a nipple shield on the left, and just tried a shield on the right. He's able to latch great and there's no pain. Can I use this for a day or two to get him comfortable with latching to my right without it effecting my supply?