Jenn - deep breath! The scale flux is normal.
Was this your official weigh in with your coach?
Also, I can only guess that you are Canadian since you don't mention Thanksgiving
It take 3,000 extra calories to = 1 pound of true weight gain
No, a couple BBQ crisps did not send the scale soaring
If 9:30pm isn't your normal meal time, this could be the culprit
You say you 'traveled after work' - plane? Travel can cause water retention.
Also, your period / days leading up to can definitely cause an uptick in the scale - any chance of that being an issue?
Sounds like you had a couple different changes yesterday - I almost guarantee if you go back to a normal pattern (ie, no travel, eating at your normal times) and its not TOM (time of the month) you will be pleased with the scale tomorrow morning.