Gotta type fast before Revvy gets in!!
RDWHAHB! You are doing fine. Listen now and believe me later; "Airlock activity is not a reliable indicator of fermentation!" Repeat it out loud.
Airlocks only show you the movement of gas through the airlock. If the gas escapes somewhere else (between the lid and the bucket, or what have you, then the airlock will not bubble. I've got a bucket or two that don't bubble.
Yes, it's neat to see and gives you that warm bubbly feeling, but there are other ways to tell if the beer is working.
1. Check with hydrometer. This is the only sure way to know if your beer is done.
2. Sniff the beer. A good fermentation will burn your nose with CO2.
3. Look for visible signs of Krausen. Not the best way, but similar to keep track with airlock.
Most of all, the airlock will not tell you when the beer is DONE. Always use a hydrometer or refractometer to measure the SG of the beer before bottling.
Anyway, it sounds like you are making some beer, so hang in there. Check it again in 3 weeks.