Two of mine were impacted, both bottom. Top two came out eZ. I was put under as well.
Take the medicine as prescribed, if you still have pain try taking a half. 7.5mgs of codeine isn't that much, but everyone is different! Opiate naive people can get "high" feeling off 10-20mgs easily.
As for the food, mashed potatoes, jello, pudding, maybe Mac n cheese. Whatever you do, don't eat popsicles, drink through a straw, or smoke. Some people smoke and are fine, however creating suction with your mouth can break the scabs that are trying to heal your wounds.
What really helped me was putting a tea bag on each side of my mouth and gently biting down on them like you do the gauze they put in there. The teabags actually speed up the healing process!
Good luck bro

Edit: if you end up experiencing severe pain in the next few days, you may have a dry socket. It is extremely painful and takes longer to heal. Avoid creating suction as I said, this is what causes the dry socket. If pain persists/dry socket happens, call the dentist and he can put clove packing in them. It tastes like ass so don't swallow it or it'll be the only thing you taste for hours, it does completely kill the pain, though!
This post was edited by ug_warrior(xtc) on Apr 29 2016 07:03pm