Morning Sickness Question

Is it normal/common for morning sickness to start tapering off at 8w? I thought that was when it tended to be the worst, but mine's been easing up the last several days, and I'm 8w. Is that a bad sign? Is that actually good (because I can keep myself healthier)? I'm probably worried over something I should be happy about, but this is my first pregnancy and so I feel ok asking a zillion dumb questions. :P