Gum, judging solely by the number of us here who have had spotting, I would say not to worry!
Ceecee, welcome! I laughed at the 'sleep and be cross at everything' comment- so true! Only 11 days until your appointment now (and mine, too, incidentally), I hope it goes by quickly.
Flying, good news on the rising hormone levels. I'm of two minds about those tests. I love knowing that everything is going in the right direction, but I do think they can cause undue panic. My last pregnancy the weeks took ages to rise, meaning my hormone levels were doubling slower than they 'should have,' but I did have a healthy pregnancy. Still, I did see weeks progress to 2-3 and eventually 3+, but I didn't get the 3+ until I was 7 weeks, so I did worry because of it. This time I got 3+ at 5+3, when I was expecting 2-3, so much easier to take, but I will always warn women that the variation in normal levels is HUGE and the weeks indicator is just an average.