This far out you're probably fine, but you should see a doctor who may order a CT. I'm just a volunteer ski patroller, but we see a lot of concussions and one of my kids had a bleed that took 36 hours before any signs or symptoms showed up he ended up in the picu for a week. With a loss of consciousness and memory lapse, you should probably not be doing anything where you might hit your head again for a little while, like riding a bike. It's possible you shouldn't even be exercising/getting your blood pressure up.

The other thing that you need to know is why did you crash? Maybe you just skidded and hit your head. Maybe there's an underlying issue that caused you to pass out or become faint.

Do yourself a favor and at minimum go see your primary care physician.