Replying to DR. NS help!

today while riding keystone i went to tailside the double kink, caught my edge, and wrecked myself onto the rail. i landed hard as fuck on my stomach/chest on the flat section, and slid down the rail on my stomach. right after doing it i had to lay down for a minute, because i couldn't breathe/felt like i was gonna puke. i got up and made it maybe 200 feet down the run before i found a place out of the way to sit for five or ten minutes. i felt pretty good after that and took another run, but decided to call it a day after that.

this was maybe an hour/two hours ago.

now i am laying down in my hotel room, and the left side of my stomach hurts again. sometimes its not even really noticable, but every few minutes or so it hurts really fucking bad, and i feel like im gonna puke again. there is no bruising or noticable swelling, and it doenst hurt any more or less if i push on the spot where it hurts. i just took a piss and i dont think there was any blood in it. i haven't really drank much today so it was already pretty yellow.

can anybody tell me if i have really fucked myself up or not? the pain is definitely getting worse.
should i go to a hospital? or just pop some advil and wait it out? my parents are out snowshoeing or something, so i really dont wanna have to call them. they would be pretty pissed if they found out i hurt myself snowboarding. and it would also ruin their snowshoeing.

sparknotes: i fell on a rail, hurt my stomach area on the left side, at first it only kinda hurt, but now it fucking kills. what action should i take?