Running help

This is so me!
Source

I have a 5K tomorrow, which isn't the issue.  Yes, I haven't run over 2 miles since the last 5K I did at the end of April, but that's besides the point.

Thing is, it's a sunset run, so it's at the end of the day.  It starts at 6:45p to be exact.

As you probably know, I have a weird stomach.  I know from experience that I can't eat peppers on any day where I will be spinning.  But I'm not sure what to do about running.

Usually a run is early AM in which case the stomach isn't an issue, but this time I'm stumped.  I obviously need to eat all day but I'm just not sure what to eat and what to avoid.

Any suggestions?