I think right now just focus on keeping the water clean and get a heater if you can. If she has velvet, you'll need a medication that is made for external parasites. Hopefully someone will come along and help with that. As for the bloating, I'd fast her a few days and then feed her some daphnia, frozen or freeze dried. Sometimes fish won't eat for a few days while they're settling into their new homes. Good luck with her.