hi delicate-dove!
i went through something similar about 2 weeks ago. i was really REALLY sick (although never vomitted) right up until tues evening (was 8 weeks, 3 days then). then on wed i woke up and felt great. i continued to feel good for the next few days, but was trying not to be concerned about it. anyway, on the Sat morning (exactly 9 weeks) i woke up, looked in the mirror and started crying!! i felt great and my tummy looked heaps flatter than in weeks (had been quite bloated). i called my OB in tears on Sat morning and he said to go in for a scan first thing on monday morning. i felt great (physically, but terrible mentally) for the rest of the weekend, and was CONVINCED that i had lost the baby. i even did a few hours housework on sunday, which i hadn't been feeling well enough to do since 4 weeks PG!! anyway, i went in for my scan on Monday morning, braced for the worst, and my baby was jumping around, happy as larry in there! measuring spot on for dates, and looking absolutely fine!!
i felt like a bit of a drama queen when i found out that everything was ok, but my OB was really good about it, and told me not to worry, and if i had any concerns it was best to put them to rest straight away. so, i would recommend getting yourself in for a scan. it will make you feel so much better, and you can relax and enjoy feeling well again! there is a small possibility that something is wrong, but chances are that everything is going perfectly well, and your body is just playing nasty tricks on you!!
good luck! and let me know how you go...