1: Airlock bubbles have nothing to do with fermentation. The experts around here will tell you, they've all had batches finished wihout any visible bubbles in the airlock, and they've had bubbling in the airlock that didn't mean fermentation.
If your FG is constant over 3 days, it's about time to bottle. If you haven't checked FG with a hydrometer, there's no way to tell where your brew is.
It's probably time to bottle. The bubbles in your airlock are most likely CO2 that is working its way out of the beer and pushing up through the airlock. I'd venture to say you aren't getting very many bubbles at this point and you should never use an airlock to gauge fermentation. Use the hydrometer and life will be good.