I had all four out when I was about 30 (I don't remember the exact age). I was in the chair for about an hour altogether, although most of that time was spent on one particularly difficult tooth that had badly hooked roots. If not for that tooth I probably would have been in and out in 20 minutes.
Despite the extended session in the chair, I was up and about the same day with no significant pain. I never even bothered to fill my prescription for pain medications. It isn't that I am some tough guy, it is just that I didn't have much pain.
So, don't take the horror stories as absolute truth. Sure, sometimes people have a harder time with it, but not always. And since you are in good shape and still young (30 is not old), I bet you will be fine.
Good luck and speedy recovery.
P.S. I didn't have much swelling either. I did have some blood, but not too bad.