I have been having some incredible nightmares lately. I rarely remember my dreams, but these are different. They are full-fledged nightmares, featuring everything from zombies infiltrating trains to that creature from Cloverfield. Internet-based pregnancy lore says that this is common, presumably because your brain is trying to synthesize all of the crazy alien-esque changes happening to your body. So seeing Prometheus today was probably a mistake.
My mother went to Alien when she was pregnant with me, and reports that the scene with the alien bursting out of the guy’s chest was particularly creepy.