Thanks everyone!
Summer I get almost no side effects from clomid. The first month, I did wake up absolutely drenched in sweat. Now I don't notice anything at all. My PJs are still a bit stinky in the morning though, so I think I maybe I have just learned to sleep through it (ewwww). No side effects at all could mean that you need a higher dose, or just that you are lucky. Its not what you want to hear, but I don't think there is any way to tell without a scan I am afraid. Best of luck for your appointment next week.
Boggle - sounds like you might be ovulating now to me. I think that they realise it is hard to get the exact right day for ovulation, so they will accept a pretty wide range of progesterone results as positive. The test might be lower than it would have been if you had tested a few days earlier, but as long as you are out by days, not weeks, it should not matter.