OMG! I would get a second opinion. It shouldn't be warm or red. That is a sign of infection. I would see someone else asap.
Minor swelling and minor redness are normal. There should NOT be a very foul odor coming from the incision.
If it is red (especially if the redness is expanding), swollen, painful to the touch, and much warmer than the other leg, you should call the on call doctor today (you can reach him/her by calling the office # and listening to the instructions about what to do in the off hours). If not, you should definately be seen tomorrow. By the doctor this time.
Better safe than sorry. If there is an infection, and it is untended and travels to the bone, you will be in big, big trouble. Better to have it seen than not.
Remember that when you have surgery preformed, you are typically instructed not to bathe the wound for several days. What you are smelling might be the scent of skin oil and body fluids becoming terribly ripe - as for the swelling and redness, it is normal, yes...you've just been cut on and sewn back up, your body will react to that kind of treatment.
However, it could be infected, and it doesn't -matter- if you look silly...far better to feel a little embarrassed and KNOW that there's nothing wrong than to let your leg rot off because you don't want to feel stupid asking a doctor to examine it. Doctors are not infallible, they are human, and humans do make mistakes from time to time even if they got straight A's in med-school.
Go have it looked at if it bothers you.