I'm praying, praying, praying that I'm not. I have genetic predisposition, so that's always a fear for me (I really don't know if I could handle it, haha). My symptoms have been a bit weird and I have so much more nausea than I ever have, but I'm telling myself that's because this one is a boy, not because it's twins.
But I probably won't relax until I get my dating u/s at my first appointment (next Friday, 12th, I'll be around 9 weeks), and only see one in there.