I'm with you all! I definitely SS, and not just because there is always that TINY possibility, because I would SS even when it was impossible.
I notice new things every cycle that just make me wonder. This cycle it's the headaches and the fact that I've been having four or five dreams a night and I can remember every technicolor detail. Both can be explained by the same thing, however; I'm waking up often during the night. If you interrupt your sleep you remember your dreams, plus you don't sleep well which can cause headaches. But pregnancy also causes headaches, and people report vivid dreams as well... so a girl can hope!