Ouch! Been there a couple of times before and know that Ibuprofen and Paracetamol only just scratch the surface.
Isn't emergency dental treatment available at A&E?
I would use cloves but not everyone has that to hand. I've had a tooth abscess and it was H**L. It kept recurring off and on for weeks . The pain is horrendous. I wish your friend well and asap. I hope the dentist can get her sorted out this morning. Poor woman xx