You may have a minor concussion. Once I was hanging out with my wife and best friend in his pool. I was diving in with shallow dives... the pool is circular and it's 4 feet deep on the sides and 5 feet deep in the center. Well the last time I misjudged a bit and klonked my head on the bottom. I came up and I was insisting I was fine, and I felt fine, except it felt like there was a weird, filmy sort of feeling over me. I was telling myself I was fine but in retrospect I definitely had a concussion... my friends were very worried about me and apparently I wasn't noticing a lot of what was going around. Looking back I access that memory and it feels like I was partially zombified. Like I didn't really laugh or anything the rest of the day, I was just kind if there. My head was just sort of feeling like it was stuffed with cotton... it hurt some but not so much a headache as just pain on the spot of impact and a general bad feeling that was kind of like pain.
Yeah sounds about right. Pain has eased off in all but the spot of impact now, and the rest of my head+top of neck just feels weird.