I just had a helix piercing. Is it Ok to use table salt instead of sea salt? Thanks?

The reason you use salt is that cells want to absorb or not absorb water according to the saltiness. If you happen to have some nasty germ on your skin, it will not be nourished by salty water. "Sea salt" is nothing more than an expensive fad for yuppies who don't know anything except what the current fad is. You really should study some books about nutrition so you will know a little more than the average yuppie.