I slipped on skateboard in house, and struck my head either on window seal or the two heater pipes next to it and went completely black, fell to ground and woke confused and sleepy. Lump was the size of almost half a baseball. I woke up today and I still feel funny, a little dizzy, airy feeling and tired. I felt the bump and now its not as swelled but it feels like liquid of some sort. Should I seek medical attention? My head feels sort of unbalanced and its still that big just not swelled out like after I hit