yes best not to compare, I had lots sickness with my MMC baby lost at 11 plus 5 weeks, baby was 9 weeks
and then straight after no real major sickness , only tiny bit naseua with the next one which stuck!
I had a scan at 9 weeks, which turned out to only be 8 weeks, and so they very kindley offered me another after the 9 week point to make me feel better, so worth waiting , as long as it is