It's okay.
However, I do suggest instead of running at the same pace or distance everyday, mix it up by doing less cardio in between days to allow your body some recovery time. Just like lifting weights, lifting heavy and lifting light helps with recovery rather than just lifting heavy and resting.

So, m - 5 miles, tuesday - 30 minute briskwalk, wednesday 5 miles (or tabata protocol sprinting), thursday 30 minute briskwalk.
