Hi.. Thanks for the query.. It is commonly observed that antibiotic intake especially for long durations can cause oral and vaginal yeast infections or thrush.. If after taking a single done of Monistat you still have infection left then yes you need to go for further dose of anti fungal medication but only after consulting a local Physician.. Secondly if you still continue to take antibiotics then it can cause recurring yeast infections or prolonged duration of infection.. Already ten days of antibiotic intake for tooth infection is appropriate and now you should proceed for treatment of the tooth as only antibiotics can give you temporary relief and infection can proliferate once the antibiotic intake is stopped.. So my suggestion is to consult your dentist and get evaluated and the tooth should be treated with root canal treatment for complete resolution of infection. Hope this helps.. Regards.