I noticed particularly a decrease in breast tenderness around 8 wks...then it came back later. I never had bad nausea, but heartburn that came and went. I think your body is getting used to the changing hormone levels. I know it's hard not to worry. I remember wishing I had a window in my belly to check on the little bean! Once you start to feel movement, it seems a lot more real (but then you start to obsess about that, or at least I did).