Don't be the tuff guy it could cost you, hope it's not bad and you can get to feeling better quickly.
I to slipped on the ice 4yrs ago this month, landed on my butt very hard. My neck snapped horribly and I was on blood thinners at the time. Went into the house with a horrible head ache and stiff neck, within a few hours a was throwing up uncontrollably but my head was terrible. I was rushed to the hospital then flown to the KU med were the found 9 brain hemorrhages. 3 brain surgeries, removed my skull plate twice and a year and half of therapys learning to talk and walk again and I recovered pretty good. I have no memories of the hospital stay or a lot of therapys. Took a while but bow hunting came back and a lot of other things, just have to modify what I do.
So, don't put it off go have it checked out. Like you said it can change in an instant!
Tracy