I agree with Christy. I only started to feel a little woozy after the 6 week mark. Before that I felt nothing at all. All during this pg I've only had waves of nausea every so often it wasn't bad at all and I didn't even feel tired. Now the nausea has nearly gone (a couple of days ago I felt sick) and I mainly feel tired after work but that's only just started happening now. The one thing I did notice at about 5 weeks were my breasts looked a lot bigger and I had mentioned to my partner that it looked like I had breast implants, but they really weren't that sore at first.

Every one is different though.