Hi Sassie,
I totally understand your querie about when to run.
I started running again at the beginning of Aug, after an 18 yr break (yawn yawn!!). My inspiration being my brother, who abstained for a similar amount of time, and who is now annoyingly quick (fit, glowing and happy! [bastard!])
When I started again, I expected to be pretty good straight away, and got demoralised pretty darn quick. Me bro gave me some good advice: leave atleast 3~4 hrs between eating and running, drink shed loads of water(all day), don't try too hard.