Ok, Im a skateboarder(but a drummer at heart) and I dont wanna give up skateboarding, but 2 nights ago I fell off my board and landed hard on my left wrist....I can play decently right now But my forearms start to hurt and the underside of my wrist feels incredibly tight. SHould I go get it checked out by a Doctor?? and also, will breakinf my wrist(hopefully that never happens) affect my playing once it;s healed?

Whenever you hurt your wrist and your not sure what it is you should see a doctor about it. Especially if you don't know what is causing the pain.

For your second question I havnt broken my wrist so I can't be positive but depending on how it heals or how severe it is I could see it affecting playing ability

ive broken my wrist before and it hasnt affects my playing
but... i didnt play drums when my wrist broke so i really dont have much to compare it too
but if it helps it doesnt restrict me now

Well if your in Trumbull then I can definitely see it doesn't affect it too much,hehe thats good though.....so the pain went away but for some strange reason my right forearm hurts now??along the side of my arm toward the inside of my body there was a sharp pain when i was practicing on my quadropad......any advice?

You probably hyperextended a tendon in your arm when you fell on your wrist. Rest, ice, and NSAIDs.