Everyone keeps saying different things through these posts.

Makes it very hard to get a straight answer.
My protein powder has 3g creatine per serving so I'm taking 6g total per day.
So 1) Should I alternate this powder (finish it) with another that doesn't have creatine? Because some people are saying the body adapts and it loses it's effectiveness if you just stay on it over time. So I would go back and forth, would probably be about a month each, or every 3 weeks, that's usually how long my powders last.
And 2) As to what happens if I stopped taking it. I'm not just gonna get all weak and scrawny right? lol I know that the muscles swell on creatine, so when I stop taking it, they will shrink back down a little, but it should still leave me bigger than if I had not taken it at all right? And same with strength? Because even if it's a small benefit, then sure, I'll take it, but not if when I stop taking it, i'm going to be the same as if I'd never taken it. (sorry, shitty wording)