Just remember that bubles really mean nothing. Take a gravity reading, and then go back 2 or 3 days later and take another gravity reading. If the readings are the same, then you are safe for bottling. If not, just wait. Bubles are just a sign that gasses are being put off, and nothing more. Gasses are always being put off, and sometimes we see them through the airlock, and sometimes we don't. There are a various many reasons why this occurs, but just know that this has nothing to do with if the beer has reached final gravity. The only way you know that is to take a reading.