Sweetie, what you describe isn't a yeast infection most likely, but is probably a bacterial infection. This can happen after antibiotics too. The hallmark of bacterial vaginosis is foul smelling discharge (smell comes and goes and is worse after intercourse) with a greyish, watery discharge. Sound familiar. Hallmark signs of yeast infections are thick discharge that is clumpy, yellow or white and it itches like crazy. So, you need to get antibiotics for the BV (doctor will swab you and confirm that's what it is). Also, just fyi, the thing about chlamydia is that it is hard to get rid of. You have to have three negative tests to be assured you're negative. Have another test if you just had the one. good luck