I'm in Australia so I don't really understand why the water would be contaminated in the first place. I understand there is a lot of flooding but how would that have got into the clean water pipes? I'm not being rude. But as someone else said, boiling the water would have fixed the problem anyway. Wouldn't contaminate water look and smell different? Hope you're okay. You'd be feeling n* because you're worrying yourself so much over this. Try to take deep breaths and sit down and just calm yourself... it's hard but it's best for you.