my symptoms went from really intense at 3.5 weeks to non-existent at 6.5 weeks - so much so that the last appointment with FS at 6.5 weeks he gave me a referral for another viability scan because it all just stopped abruptly. a few days later is started again in a big way. and thats how the whole pregnancy progressed - sick as a dog for a few days, one or two great days, and then extremely ill again! it was constantly screwing with my head!