You mean Bentonite, but is very important to know if it is calcium or sodium, swelling or not swelling...
Did you order Terramin or Pascalite?
Either way. I hope you got powder, not tablets or capsules. Powder works faster and easier on the body, because the body does not need to dissolve it.
Start with 1 teaspoon of clay powder in 8oz of water, 3 times per day on the empty stomach.
Stir well with a plastic or wood spoon, let it settle for 10-15 min and drink it. First 2-3 day drink only the clay water, not the heavier part (I think they call it lava or margma..), if you have a pet mix some in their food or put it in the flower bed...After 3 days drink all of it, may be not the very griddy part.
I drink the first glass in the morning 1 hour before food.
The 2d I sip during the day, a little before lunch, a little after, a little before dinner, a little after.
The 3d glass right before bed.
Also, drink a lot of water, but you will feel thirsty, so it should not be a problem.