Are you on city water? Or are you on well water....It sounds like there is bacteria in your water...I'm on well water, So I always check my bacterial counts...and a reverse osmosis system would help with that...I think they help with metals in the water too....You can bring your water in to get tested for bacteria/ecoli for free..somewhere in your city..you can also have it tested for metals..at an environmental company...that will cost around $100.......the first signs of bacteria are vomitting and diarrhoea...