I sympathise with you, having spent last week with an infected impacted wisdom tooth. It sounds like you may have an infection, with the amount of pain you're having, and no amount of pain killers will help. Is your surgery part of an out-of-hours emergency service? If so, they seem to operate in the early evening - don't know if that makes the childcare any easier? (If they do, get to the clinic early, as it's first come first served at most of them). Failing that, could you phone the dentist first thing and explain the pain you're in and the lack of childcare, and see if they can fit you in sooner? Also - would A and E see you for dental pain? If you phone your local hospital, you can ask to speak to someone in a and e. Good luck, I really feel for you.