Wait until you get older. When I get up to stumble to the bathroom at night, my feet, ankles, knees, and every other joint on my body wakes the dogs. I sound like a burglar in a mousetrap factory.
Hmmm i used to get those when i was younger, but they have gone away now...
try counting in japanese :karate: for whatever reason i can do at least ten more push ups in a row when im counting in japanese... i think its psycological from the days back when I was taking karate.
other than that, is there anyway you can do the push up differently maybe, arms closer toghether? maybe streches