I hope it doesn't become painful.

DH once broke a tooth when we were on holiday and interstate. Fortunately he was still in the ADF but we had some convincing to do before dental would see him rather than make him wait until we were home.

It sounds like you are waiting to get home, so that's good. Hopefully it's not a rough edge to hurt your tongue.

How to be brave?? Ask for happy gas? Could you make an appointment at the beginning or end of the day so DH can mind DD, or do it when she is in care?