Im almost 8 but possibly 9 weeks as I may have my dates wrong and I had a bit of bleeding earlier this evening. Just when I wiped and not enough to stain my underwear.
I'm worried too so like you panicking that something may be wrong. If you landed on your bum I wouldn't imagine the fall could have harmed the baby.
I've got an appointment at EPU tomorrow so if your concerned you should call your nearest and try and organise a scan to make sure all is okay.
Hope the bleeding stops and all is okay xxx