Should I stop pills mid-cycle due to breakthrough bleeding?

Patient: I currently suppress my period using oral birth control. I’m planning to have a period next month (January 2012) and my physical is scheduled for dec 29. I have started some breakthrough bleeding on and off over the last few days. Should I go off the pill now and have a period before my physical, or wait it out and hopes it clears up? I would think breakthrough spotting may interfere with my pap results?