I have what i believe to be a stye on my upper eyelid. i first noticed it last night around 9:00. it's a little red and swollen, but i cannot see a pi?

Heat treatment: Use a warm wet washcloth held under the very hot but not scalding tap in your kitchen. Put it over the lid on the affected side (really both lids as yours eyes should be shut) and do this about 5 times per day and 5 minutes each time. This almost always will eliminate a stye. Antibiotics and things at drug stores like "Stye ointment" will have no effect.