Loose iPhone 6s home button

I got the iPhone 6s a little over two weeks ago, and I've noticed that occasionally when I push my home button it clicks twice? it clicks once when I start to push down on it, but not enough to light up the phone, and then it clicks the second time when I actually push the button. I don't know if this is normal or if I should be worried.

I also noticed that if I look really really close, the button moves. Not much, very slightly, but I can juggle the button around. The amount it moves is like maybe the same width as a strand of hair, but it still bothers me, and I don't know whether I should get it replaced or not.