Foul Smelling Discharge. This situation?

Since a few months now I've been experiencing discharge with a foul smell. They're generally white or yellowish in colour, and more often than not, the texture is of cottage cheese. There is no pain in the vaginal or abdominal areas. The odour intensifies right after my periods and stays the same for about a week and a half. I've also tried menstrual cups thinking sanitary napkins and tampons might be causing this. After my cycle the odour stays, but not too strong. I'm a cyclist and I feel the smell strongly after each riding session. I haven't been sexually active for over 5 months, so that might not the reason. I've also tried yoghurt and probiotics. Is there a possible medication I can take that will help me with this situation? I am really embarrassed to change in the gym or even have any sexual encounters because of this reason.