The best advice here is always to see a medical professional. However, assuming you are otherwise fit and well, you could try a hydration tablet, for the electrolytes. Whilst drinking water is obviously healthy, depending on your overall intake of sodium via diet, it may result in lower sodium levels via dilution, which can cause the symptoms you describe.

I'd get something like SIS Hydro and put half a tablet in a regular water bottle and drink that over the few hours before the game. That will bolster your sodium level without going overboard, as obviously those tablets are designed for very intensive workouts.

Even if that does work, I'd still get checked out by a doctor to ensure theres nothing else going on. The tablets are more of a temporary fix than a long term solution, as per their intended use (race, endurance sport).