I seem to be blushing a lot recently. I'm wondering whether it's a hormonal pregnant thing?

It's a pain because I'm at a professional conference at the moment and I keep getting caught out with small things like I haven't read a paper someone mentions to me, and I blush bright red like I'm totally bothered by it, when normally I'd be able to nod and look serious about their great paper, as if I had read it already.

Has anyone else experienced this one?