I would go to ur docs an get checked out if you are worried! It could jus be stress from the car crash that is stopping u from getting pregnant at the minute as it was not very long ago! In the mean time don’t get to stressed and enjoy tryin! For peace of mind i would visit a gaenocologist to carry out any necessary tests. That way you know for sure rather than wait around and assume and just get stressed about it. Sometimes when your body or mind has suffered a trauma, shock. It can take a while for everything to run smoothly again. Get checked and good luck. I have a friend battling secondary infertility after a car accident in which she fractured herself. Doctors swear up and down its not related to reproductive organs and to see a fertility specialist. Which she did and everything checks out perfect. Frustrating and heart breaking.