Make the most of it!
On saturday morning I announced on here that I barely had any symptoms and I was actually not feeling pregnant. i wasn't bloated, my boobs had stopped hurting, i was wide awake etc etc.
Two hours later I virtually keeled over with exhaustion and slep all afternoon. I have been tired and headachy ever since!
I read on the internet that you and I are at the stage where we are about to hit a bout of 'extreme tiredness' during week 10, before the good bit starts at week 12, so I would make the most of it if I were you and try not to worry too much.
Hope this helps