I was on the swing when I let go to get off and I feel backwards and my stomach hit a huge wooden rail. At first I just felt the extreme pain in my stomach and then a few seconds later I realized i couldn't breath. The next thing I know everything is dark and I feel like I am spinning really fast. I was then able to see for a second then everything was dark again. But then I was able to breath and my stomach hurt like hell but I was able to go inside. This happened like a hour ago and I just want to know what will happen next? I am really afraid I'm going to pass out again but I feel ok. Can I go to sleep or will that give me a concussion or make me pass out again?