I agree - give it time. The queasiness and gas are acutally signs that it is working! Your body is getting ready to get rid of some serious toxic buildup in your guts.
Your body is sort of saying, "Hello, what's this? Something that is changing the status quo around here?" it is used to being blocked up and sometmies things start moving and bubbling and giving off gas slightlty before you start to have those awesome 3x a day bowel movements from the formula. Be patient, and just keep following the directions and as Bob said drink LOTS of water throughout the day.
Also, are you waiting 20 minutes after you eat to take it? I find that that is the perfect amount of time and if I take it too soon or too late that I sometimes get a bit tummy rumbly.