Dropped Iphone 5s off my bed: Can it be damaged internally?

Okay so I had my 5s on my bed next to me and I was careless and it fell off my bed. It fell like 3 ft onto wooden floor. I had my OtterBox Commuter case on it. It made a pretty loud sound when it hit the floor. I checked the phone and it has no cracks or chips that I could see. Can the phone have some internal damage. I've only had it for a month. I'm afraid that something might be wrong with it.

Added (1). Everything work so i'm assuming its okay

Added (2). It landed on its back

If you have an otterbox case, then you should be fine. I recently dropped my iphone 5s too, but I also had an otterbox case and everything was still working and there was no interior or exterior damage. Just try to be very careful!

Does everything work?

We don't know. We're on the dating section. We know dating.

What side was it dropped on? Please be more specific.
If it does not work, or seems to be glitchy, it may be a slightly defected Iphone.

I think it is for another reason. A pone is made with capacity to get dropped.don't be worried. Best of luck.stay fine