Feeling Fine

So I'm 8weeks 5days. I was feeling nauseous, tired, my breasts hurt so much and I just didn't find food appealing. The last few days I've done a 360... I don't feel pregnant anymore if that makes sense besides my breast still hurting. Is this something other people have felt or should I be concerned. With my first pregnancy I had not a sign I was pregnant until I started showing, I'm a worry wart so I'm just concerned.