is my 3 month old kitten severly sick?! please help?

You need to get some fluids into this kitten ASAP...a syringe works well, but he definitely needs water. Get him a GOOD QUALITY canned food and try to get him to eat that also...but water is very important. If at all possible I would try to get him into an emergency clinic tonight. He needs professional care.

It's a new environment, his lungs might just need time getting use to the air. Play it safe though and call your vet ASAP and let them know what his symptoms are and see what they suggest. Edit: From what you've added, it sounds like a simple cold, your vet will either give you medicine for him, or if it's really not bad, will simply suggest ways to help him get healthy faster. Be sure to clean his nose for him when you notice the boogies. Your kids can't contract what he has, a feline cold and human cold aren't similar enough. When we get sick, our cats don't get sick with us, so you're kids should be perfectly safe around him.

First, be prepared. There is a pretty big possibility you could lose him and the longer you wait, the more that possibility becomes a probability.

Second, look for an emergency animal clinic straight away. Don't wait until Monday.

Yes, the poor kitty is sick and he's meowing like crazy because he is begging you to help him/her. Go to yellowpages.com and find a 24 HOUR animal hospital in your area; they're everywhere and take that poor baby to get treatment. Baby kittens follow their owners everywhere because you are his mommy now. He is also cold because he has no meat on his skinny scrawny little body to keep him warm and your body is warm like his mommy if he was still with her so, that is why he sleeps on you because of your body heat. Poor kitty. Please take him NOW.

have you tried a different brand of food? make sure hes getting water and NOT milk unless its nursing milk from a cat or a formula.

Vet asap... Not good if hes wobbly