Suggest Medication For Yeast Infection

i have had a horrible discharge now for about 2 months and i have been in and out of the doctors at first they said it was a yeast infection so i took a pill and nothing happened. then i went back in and got a pap done and it came back negative for stds. they said i had some bacteria so they put me on clindamiacin and another one that u cant drink any alcohol with and all they did were get rid of the horrid odor i had. now it has came to the point where im completly swollen i cant even fit a tampon in and its very painfull whats wrong with me??