Is my platy going to die?? :(?

I was watching my platys today because two of my females are expected to give birth soonish and then something strange happened. One of my male platy fish got really startled today from the dominant male in the tank and it careened headfirst into the glass... now hes shaped like an S. He can swim fine and aside from being very nervous he seems alright, but he doesn't seem able to move his head back. Like he screwed something up in his little spine or something :( He can't physically move himself into a straight line. What should I do? Will he survive this? He's still in the main tank because I'm afraid to startle him more. Any advice is very helpful! This has never happened to me before... the last time a fish of mine looked like that it'd gotten sucked up by the filter. :(