In the middle of last night i woke up really thirsty with a really dry throat. I couldnt be arsed to get up and get a drink so i found half a bottle of water under my bed from about 3 months before christmas! Will I be ill now i took a swig out of it? It tasted ok.

you done this question already Firstly you dirty so and so

the water may well carry some germs lets hope you are fit enough to fight them

Throw the water away and tidy your bedroom What other things are living under your bed? The water could have been contaminated because if it was previously opened. An unopened bottle... no worries. Yes, and throw it out and clean your room. It is unlikely it will hurt you if the lid was on properly I don't see any reason why it shouldn't be Can you remember how the water got there?

It may already have been drunk once.

As it has already been opened then throw it away, bacteria can grow in stagnant water and give much nastier things than a hangover. You sure you didn't wake up in the night 3 months ago and p**s in that bottle?