giardiasis
"I had a hysterectomy and was given a large stress dose of steroids as well as iv antibiotics during my hospital stay.  These are both contributors to yeast overgrowth, as I later found out.  It manifested everywhere... the folds of my skin, vagina, and mouth, that were confirmed.  My doctor prescribed 500 MG 2x daily for 10 days.  During treatment, I had a bad taste in my mouth, coated tongue, smelly gas,  and stinky, white-ish soft stools that sunk immediately and didn't float.  I've been done with it for about a week, and the side effects did not seem to improve, but have only gotten worse.  The taste in my mouth is absolutely intolerable, and I now also have headache, heartburn, weakness, and constant vaginal discharge."