it will be later when the local wears off that you will feel it got any painkillers i've had 5 teeth in one go removed and 3 (wisdoms) in a seperate one both times cos i'm a nervous patient i have been under sedation
mashed potato is good as is ice cream for when you are allowed to eat
i think you will be fine to drink to in fact when i have had mine out they encourage it i just use a straw to minamise dribbling