Could I have concussion or bleeding in my brain?

There's absolutely no way anyone on this site can tell if it's a harmless concussion & a bump or a hemorrhage. However, 95% of the time in case of brain hemorrhage's the person will feel one or several distinct symptoms - a sharp "stabbing" pain, pulsating headache, dizziness, nausea, loss of sensation in limbs, temporary paralysis (depending on where the hemorrhage is located) the list goes on and the more symptoms I describe the more you'll convince yourself that you feel them. If I were you I wouldn't take any chances, the brain can be useful in life :> Go get your head checked out boy/girl!