Hi, I Fell Riding My Bike And Landed On Hand.

Hi, I fell riding my bike and landed on hand. my wrist and thumb are in extreme pain and i can barely lift my hand. How do I know if its broken or just sprained? is it urgent that i go the emergency room now and get it looked at or could i wait to see if the pain goes down? after doing some research it seems that it could also be a scaphoid fracture because that is exactly where the pain is located.