Well, here is the thing. Did she test you for a bacterial infection, or is she just giving it to you "in case" it is bacterial, like so many docs used to (TG they are not doing that as much these days)? If there is proof of infection, that would lean more towards taking the antibiotic. Can you ask to be tested if you have not been? If you have proof of bacterial infection, then yes, taking with a good probiotic along with it is a good idea.