I get different symptoms at different times with all my pregnancies - only one of which has made it past 9wks. I think I remember with J getting really bad MS around 6wks - up until then it had just been random, vague nausea. But at 6wks, BAM say in front of the toilet ringing the doctor for anti-sickness medication so that I had a hope in hell's chance of making it into work.
This time had bad nausea (lie in bed, close eyes, pretend it's not happening kind) a day or two after BFP, then slightly milder nausea the next day, and then it's been fine since. Appetite's a bit off, but when I'm hungry, I'M HUNGRY, if you know what I mean.
Give it another week or two. I'm certain the MS will have caught up with me by then!