 [ Symptoms ] i have been taking penicillin for a bad tooth and forgot i performed oral sex on my husband and now have a sore throat some vaginal fluid was present can i take diflucan while taking the penicillin [ Disease ] hi taking antibiotics not only kills the bad bugs but also the good bugs so having oral sex was not a good idea as you have found leaves you open to picking up other bugs once you have finished d o get on some acidophilus this gets you your good bugs back and working chuck in some yakult and you good as new your throat could be a yeast infection either see your doctor or go to your drug storechemist for some otc drugs hope this helps you good luck