Replying to Do I have a concussion?

I dont see how I could have a concussion, but I do seem to have a few symptoms of it, I was on my garden drop in the other day and crashed, got a pretty bad headache all day after that, but i watched the video later and my head didn't touch the ground, even though it felt like it did. I was also wearing a helmet. This happened 2 days ago, and last night I've had a headache and also tonight I've had one too, whenever I lie down I guess. Been drinking a Lot of water too so doubt I'm dehydrated. Also when I came out of school it was super bright. Probably the brightest it's ever been and apparently that's another symptom. So what do you guys think, is it possible I have a concussion?