Have got a cold!?

Unfortunately I definitely have got a cold....
I have a runny nose, sore throat, and probably fever, too.
Last night because of those, I couldn't sleep well.
Also today I can't concentrate anything.
That's why I didn't/couldn't upload my blog, either.
So I should take enough rest tomorrow at my place,
and have to ready for classes, work, and presentation.
Is it because suddenyl the weather changed?