5 weeks 6 days.  Almost to that 6 week mark where the majority of people say their morning sickness begins.  Today, I felt nauseated for more than 6 hours, causing mild distress, with 3-4 different episodes of nausea.  I have been plenty hydrated and have had NO vomiting, so I am trying to eat things full of fiber to help alleviate the constipation.  Ate a salad last night.  Been eating celery and carrot sticks.  amazed my stomach is able to handle that much fiber because normally I can't keep raw vegetables down.  But, I have not started vomiting yet.  Maybe, this time, it will not get much worse?  Took ondansetron at about 3 this afternoon.  I am not actually convinced that it has been working for me this pregnancy.  No noticeable relief after i take it like i am used to- of course, it never really brought the nausea down much, just the vomiting, and i have not had any of THAT yet.