I had mine done about six years ago and have never regretted it or had complications. The procedure was easy; my girlfriend at the time was so happy she didn't have to take the pill any more we bust my sutures the next day.
I am sure they are going to go over all of this with you if they haven't already, but get two bags of frozen peas and some ... shit, I forget if it's ibuprofen or not (double check with your doctor). Anyway, alternate the bags of peas, try not to do much for the first day or two, and watch for bruising. Bruising can be an indication that you're bleeding in the bag, and if so you should contact your doctor immediately.
Congratulations on being responsible. There are so many benefits of getting one, for you and your partner(s).