So you are about 3 days in. Don't do anything. Wait. Have a homebrew. I would wait until about the 7th day, then take a gravity reading. I bet you'll find your SG has dropped further. Airlock activity (or the lack thereof) is meaningless.
Brody's Brew House
Primary: Scottish Strong Ale
Seconary: Don't use one, generally
Kegged: Sweet Potato Saison
In the fridge: Czechvar, New Belgium sampler
Planned: Either a Porter or an AIPA. Possibly a RIS.
"For a quart of ale is a dish for a king." - Shakespeare