If you are about to get your dubscription changed you shouldn't mess that up with the aid of naturals actually.
To be honest only a strong diurheticum is what you haven't tried so far on the natural side.
But at first let your doc change the medication, then look if it still could be necessary, then speak to your doc and only then try the stuff again. Everything else could just mess things up.
Good luck with getting it under control.