Take a gravity reading. Wait a couple days. Take another gravity reading. If the SG doesn't change, then fermentation is complete.
The bubbling in your airlock is not necessarily an indication of fermentation. It could be a result of residual pressure in your fermenter.
Brody's Brew House
Primary: Sweet Potato Saison(
Seconary: Don't use one, generally
Kegged: Scottish Strong Ale
Planned: Either a Porter or an AIPA. Possibly a RIS.
"For a quart of ale is a dish for a king." - Shakespeare