I've had a numbness like falling asleep senstation on right side of head comes and goes for a month and a weird twitching on left temple. stress?

Unclear: Since you are being treated for a sinus infection situation is more complex. Pay attention to what part of right head goes numb. Nerves to anterior skull are different from nerves to posterior skull. The fact that you are young and symptoms are on opposite sides of head makes possibility of concerning illness less. Stress can cause non-specific, wierd symptoms; but caution when infection.