Uncomfortably numb!

Total 5 miles running in 2 days last week has made me all numb. I can't believe just two months back I finished 26.2 mile long Philadelphia marathon in 5 hrs 40something minutes. Not good, its so hard to gain the stamina, takes so many months and it takes no time to lose it all! No point in dreaming about those size 2 jeans from Abercrombie I was fitting into a month back if im gonna eat like a pig and not exercising at all!