>>3417399In the future you should put it in your carry-on. The carry-on x-ray machines are apparently lower power than the ones they use for checked bags. You can also ask the TSA agent at the security area to hand inspect your film. Most of the time they will oblige you, but some may insist you put it through he machine.
I had my film x-rayed multiple times on a recent trip and it came out fine. It was mostly ISO 400 but there were a few 800 rolls as well.
Get it developed. There's a good chance it's fine. Pic related was from a portra 800 roll that got x-rayed twice.