Waterproof Watch

Hello All! I am new to the forums. I am starting my third year of nursing school. Last year during clinical I purchased a cheap $6 watch from Walmart with a leather band. It seemed to hold up during clinical but when I wore it to work this summer as a CNA it kept fogging with water and ultimately stopped working. I need advice as to where I can find a good waterproof watch, not digital, with a plastic/metal band. I have been looking online for nurse's watches but all I can seem to find are goofy looking ones with characters on them or ones that don't look like they are going to last more than a day in a hospital setting. I looked online at the "Swatch" company and their watches seemed to fit what I want but are too expensive for my budget/I wouldn't want to get bodily fluids on a nice watch! I'm not looking to spend more than 30 dollars. Please help.