A question , I have for you is if your partner is being treated with antibiotics as well. It could possibly be that the infection gets transmitted back and forth between partners. I is a misconception that partners only need to be treated if they have a positive test. Screen tests are not very accurate and sometimes may come up negative even though a partner harbors the infection. This could be another aspect to consider. An STD clinic might help in this arena and proper medication for both partners must be taken.