hi kelsta, welcome to the forums.
how much are you feeding your fish? i would be feeding very lightly for a few weeks, until your tank cycles. also why add whitespot cure and salt? it not very good imo to just add stuff incase thats whats wrong. better off to find out whats actually wrong. the lfs(not all) are sometimes just interested in making a sale, and will sell you whatever medications etc they can. I look in my fish cupboard and see probably $100 worth of stuff i have been persuaded to buy- whitespot cure, wunder tonic, activated carbon, ph up/down, and the list goes on...
anyways thats my 2c worth, hope you can get it sorted