Try to keep rolling away from bed after you land on the floor. Some say that it's easier to get up once you are further away from your sleeping body. Maybe it will also fix your head pain.

In my opinion, this could be lucid dream via WILD or OBE. One of the ways to enter a LD via WILD is to roll out, stand up or float out of your body. Which is strikingly similar to way OBE is described. But I think that a difference between a WILD (LD) and OBE/Astral projection is less about how you exit and more about where you end up. In a dream (space constructed in our mind) or some other plane of existence with other real entities.