Pray the driver didn't get aggravated enough to take your plate down, call it in, and swear out the affidavit, since you missed all of the signs of a stopping bus (flashing amber lights and the slowing of a gigantic bright yellow bus at least, never mind the flashing reds which may well have been active before the sign flipped out). Outside cameras may not be usable because of the bus company/municipality relationship and the ban on the use of cameras for traffic enforcement.

The state's site says "Under 20" drivers can get the 20 day suspension for underage bonehead awards and you're 20 so you should be okay there. You can still get hit with 6 points (SAF-C-200), a $750 fine (RSA 265:54), and a rather unpleasant note from your insurance company (how many years to get your safe driver bonus back?).