I will pitch in my 2cents as a dentist....
Without a health history and knowing your particular situation, it is hard to give and get direct advice about a case like this.
Remember, however, that you do have an infection. This is a "stress" on your body, so if you choose to exercise (which should be okay if your health history is clear) keep it moderate and don't overdo it.
When you go to bed, sometimes it helps to prop up your head on a couple of pillows to keep comfortable and get a good night's sleep. Has your doctor prescribed any anti-inflammatory medication? (e.g. ibuprofen).
Finally, you will most likely be given post-operative instructions by your doctor following whatever procedure is done. Read them and follow them for an uneventful recovery! Best wishes and speedy healing.
Don't forget to eat well and drink fluids for proper healing, too.