What does a white naked lady ecstasy pill look like?

What does a white naked lady ecstasy pill look like? These are the ones I was sold, and I'm questioning their validity. They are about 3/4 inch in diameter, white, a tad bit speckled, and they taste really sour like warheads. They are not bitter at all, like I am used to. I just don't think I'm feeling anything, and I want some opinions. Please help me.