Replying to Head impact causing bleeding from nose?

I was having a bad day in the park today, basically just falling a lot on jumps. At the end of the pipe, I tried to pretzel the lip (don't ask why), and of course I caught an edge and slammed my head. I didnt hit anywhere near my face, but my nose started bleeding, not very badly though. for the rest of my day, it would start bleeding again after every time I fell or landed hard, even though I didn't hit my head again. I wear a bern hardhat, and it didnt feel like a concussion or anything serious. The same thing happened last season, when I dropped 20 feet to a flat road (didnt even know it was a drop). I landed on my feet, but my nose started bleeding like it did today.

Is this normally what happens with head impacts, or is this something I should get checked out?