On 5th day 2 week cycle of bactrim ds for non std epididymitis & few symptoms are still there. swelling & pain have reduced significantly since treatment began but still occasional swelling and minimal discharge. is this normal as meds do their job?

Yes: In general, symptoms should improve gradually over the course of antibiotics until they vanish completely. Even if the symptoms go away before the antibiotics are gone, a course of antibiotics should always be completed, in order to avoid the development of resistant bacteria. Worsening symptoms or other concerns should always be addressed with the prescribing physician. Hope this helps!