Has anyone else experienced this? I am 8 wks pg and keep getting what I can only describe as mild contraction like sensations when I am suddenly startled - eg was just having a nap & hubby came in through front door - sound of key in lock woke me up and had this funny sensation. has been happening a lot over last few weeks - also when dd wakes crying in night. Seems to be related to being startled and woken from sleep. Is really weird. Am concerned as have been bleeding and am going for early scan tomorrow - wondering if this has in some way caused bleeding. it's so odd!