Replying to I have peed 12 times so far today

I got sick last night, and finals are approaching fast. My friend said he got over his cold really fast by having huge amounts of vitamin C and water. So i've been following that today, and man... I think I've downed over 5 liters so far in liquids, including 5 cups of tea. I'm using the bathroom now every 45 minutes, like clockwork. However, I feel only marginally better, and I usually feel like I need to pee. Has anyone else tried this plan? Does it work or is my friend just one of those people that gets over colds in a day?