OK, thanks. I think I will wait till next AF is due and see what happens. The nausea is usually when I first wake up and about 1 hr after each meal. It's not really that bad, just a slight queasy feeling. No other symptoms though, so I'm guessing it's just some sort of bug. That said, I know my Mum didn't discover she was PG with my sister until she was about 20 weeks, which makes me wonder whether she kept getting AF (is that hereditary?). I suppose I should ask her about it. I'll let you know the outcome in a couple of weeks time... :-)