Try over the counter products (ie Advil Alive etc) or products for minor tooth pain they may help enough until you can see the dentist on Monday. If not, you may just need to go the emergency room. since they should be able to give you a stronger pain medicine. If you do not have health insurance to coverage the cost of going to the emergency room, you may want to try the over the counter products first. (A bill to go the emergency hospital may be quit costly) Go to a place that has a pharmacy and asked a pharmacist what they would advise. Not only is that free but they will have the experience to give you better advise.
I hope this helps and that you feel better soon =)