dont get worried it normal with some women, i never vomited nor have morning sickness in my first pregnancy.
Yes its normal I experience no symptoms throught my entire pregnancy. I dont think so I believe it is 8wks when you hear the heartbeat. Sometimes yes but because you havent felt any cramping then your probably fine. If your still worried about it go in to the docs and get checked out. I fell full frontal when I was prego with my daughter and everything was fine. Of course my knees and hands werent so fine cause they caught 95% of the fall.
every one is different but it is still normal to not have any symptoms. make use of this time because you could wake at 3am fine then by 7am up puking with morning sickness. it hits so quick for some, if you are going to get any. after 7 weeks you are more likely going to see a baby on the ultrasound, late ovulation/implantation can delay this but it is normal to not see anything at 6 weeks although some still do see something. when you see baby, you will see the heartbeat. a bad fall can lead to miscarriage, i am not sure how soon afterwards it would be so i would say this to your doctor when you next see them. no bleeding is a good sign though. good luck!