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I am sorry to hear you are worried about your kitten. I am a veterinarian and will do my best to help.
How big where the white worms you saw? They are probably tapeworms, which pass as a 1/2 inch long, moving, white worm. Revolution does not kill tapeworms; you need a medication called praziquantel.
Flea eggs are microscopic in size; you can't see them with the naked eye. If you are seeing black dots in his sleeping area that could be flea dirt. If you can clean his sleeping area, or put his bed or bedding through the washing machine and dryer.
If you are seeing any fleas on him, do not use the Revolution again until the 10th, but you can bath him in Dawn dish detergent to kill fleas. Be sure to rinse him and dry him well afterward.
Let me know what else I can answer or help with. Rebecca
Those yellow grains of rice are probably more dried up tapes worms. The praziquantel should help.
Let me know if I can help with or answer anything else, and let me know how he is doing. Rebecca
Kindly consider rating my answer ( always appreciated!); you can still get back to me with updates and questions after rating. Rebecca
How is your kitten doing?