Get your dentist to prescribe a penicillin. that should hold you for a month or so, usually does for me. Give you time to save up for the root canal. You should try to bargain with the dentist for a cut in the fee because you have no insurance.
Geez, SCP, now that you are in this composing mood you should pen a manual on the best places to poo. You could call it "SCPs' Pleasant Places To POO" and sell it to AAA to be sent out to their members along with all of the road maps.