Headache, neck hurts etc. I always feel guilty when I ring up and tell my employers that I won't be in. I feel they think being off with a cold is a bit flaky. I remember when colds were just a stuffy nose and runny eyes, these days it knocks you for six!
Don't think I'm well enough to go in tomorrow either and I feel guilty already.
no, you are not being flakey.
first of all - a bad cold has the effect you describe, to the point where you have no strength to do anything..certainly your work would suffer.
secondly - there is a danger of transmitting it to your work mates -- something you do not want to be responsible for.
take it easy,with lots of rest, and get well soon.