RANDOM SCENT ?

So I used a douche like a month ago . I was hydrated with lots of water and have not been lately ...
So out of nowhere in the last 2 weeks I've noticed a scent . My period might be coming soon . Well should be ... I never have a scent and now I do . 
I'm trying to change its out how the heck it happen and what do I do I shower hit after a few hours it's back !!