Betta help

Hi! I'm surprised worried about my Betta, he's been bloated for the past threeish days. I've done a salt bath, used melafix, cleaned his tank and have been fasting him but nothing seems to help. One of his scales seems to have fallen off after going white and I'm STRESSING. Terrified it may be dropsy but this is my first time owning fish so I don't really know. any ideas?