BETTA FISH HELP!!!! HE MIGHT DIE?

Okay so just 5 minutes ago i was feeding my male half moon betta fish before i changed his bowl (he lived in a very crappy fish bowl for 3 days) and know i just changed him to his 5 gallon tank which is filtered by a power filter and he just puked some of his food and also he seem a tad white in his mouth (although it might be because he has know a light bulb taht illuminates his tank and it might be that i never saw it in his crappy bowl)