Don't kill yourself you may miss a miracle.
no effective medicine for yeast, a proper diet will handle it. yeast is doing it's job fermenting the crap you eat so it does not do worse inside you. Cut the crap and the yeast balances out to normal levels. Everyone has yeast. Balancing it is easier than killing it..
as for Sea Salt click on the blue link that says "sea salt"
read about it then you will learn where to obtain it.