You can, it will just take longer then it did the first time. You can incorporate other endurance type cardio that would compliment and help you build up to more miles, say a spin class.
That said, there is no reason you only have to do one exercise a day. How much time do you have for a work out? An hour? Do 10-30 mins of running then use the rest of the time to lift weights or do the elliptical or whatever.
I also don't know your situation, but I run early morning when everyone is asleep before work. Then 3xs a week I hit the gym while my husband helps out with DS. If running and exercise is important to you there are ways to make it a priority.
268 lbs - Journey Begins (January 11, 2006)
197 lbs - 71 lbs lost (October 15, 2007)
247 lbs - 50 lbs gained pregnancy (August 22, 2008)
195 lbs - baby weight gone (July 7, 2009)
168 lbs - 100 lbs lost (March 26, 2010)
148 lbs - GOAL! 120 lbs lost (July 18, 2010)
138 lbs - 10 lbs under goal (December 29, 2010)
PR 1/2 Marathon - Time 1:59:50 (November 11, 2012)
PR Marathon - Time 4:40:53 (March 18, 2012)
Today 140s & training for my Health
"There is nothing you can't have tomorrow so there is no reason to eat it all today."