That's why I always have my bangs cut at least a month or two before any special occasion/event. So they can grow out if any styling disaster happens. 
I do trim my own a lot though -- secret to this is to not cut straight across but rather cut vertically into the bang -- like just snip upwards at the longer pieces.

It's a recipe for disaster.
That's the worst. 

Just don't overuse it, I beg of you!
Apply very little to the fingertips, and run it through the front of your bangs. They'll come out shiny and feel so soft throughout the day.
Please let me know how it works out. If it doesn't help your bangs, it's a great thing to use for little "baby" hairs and fly aways that won't stay down.

I guess I'm just blabbing and we'll see what happens come Friday. 
I haven't decided what I want but I'll walk in anyway and see what happens. I might get them at blunt bang length while being able to push them to the side.