My belly button hurts a little it's a little red around and a little hot. And when I go to clean it with salt it has puss in and around the top. Not button. I ran out of that h2cohen spray and I use regular salt. Do I have a infection.

Yes it is infected. How are you using the salt, it is not to be plain salt? Use sea salt mixed with warm water and always apply with a clean applicator.

If there's puss than it's infected.

It's time to see your doctor. He'll likely give you a cream and tell you what to use to clean it. You may even have to remove it and have it re-done after it heals.