It looks like you're new here. If you want to get involved, click one of these buttons!
No proven side effects for creatine. Your body naturally creates creatine, it was however discovered that the body doesn't make the maximum amount of creatine it can use, hence supplementation.
It's only creatine monohydrate that's proven effective in lab studies. So as much as some brands would claim they have a better form, no proof of it.
You only need 5grams a day, once loaded, you won't be able to take in more than that in your body. You can opt not to do a loading phase, this simply means it takes longer before you become loaded.
You end up drinking more water when loading, coz creatine makes your muscles absorb water. It's possible you drank more water than needed hence the bloated feeling.