Two day old kittens infested with fleas?

Use a flea comb for the mother at least, dip it in soapy warm water to kill the fleas. Comb her maybe twice a day. If you are very gentle you could probably comb the kittens as well, but not as much. And stop stressing. Wild cats have kittens everyday and there's no-one to de-flea them but they do fine. Good luck.