whoa, whoa, whoa! WAY too much, hon, that's what your body is telling you!! nobody should run 6 miles a day every day consistently. you're not training for anything are you? running is too hard on your knees and joints and by doing it that often, you're really increasing the risk of injury.
and i'm a runner, so don't think i'm just some quack telling you random advice.

luckily, because running is such a great workout, you don't need to do it as far or as long as you would some exercise machines. try 4 miles per run and do it 5 days a week. that's still a TON of exercise (could do less if you wanted), but with less mileage and two rest days, you'll be feeling great in no time!