I Hit My Head At My Friend's House Running Up

I hit my head at my friend's house running up the stairs. It bled a little, and I felt dizzy and lightheaded. I also went to a bowling alley earlier and ate food as I touched bowling balls. Today, I am lightheaded and dizzy, I have nausea and diarrhea/constipation on and off, and I am slightly groggy. Not all of these are symptoms of a concussion. Did I pick something up at the bowling alley? Should I still get checked for a concussion? I have slept without problems so far.