I'd say bub will be fine, at that stage baby is so small and well protected by the uterus and the surrounds that small falls like that wouldn't affect baby.

That being said, I know how scary it is not to feel baby and I highly doubt you will get baby to move for you by eating anything at that gestation. My advice if you're really worried to see your GP (most GP's wont do heartbeat checks until after 20 weeks as it can be very difficult to get and just make Mum worry more if no luck), or go to the hospital where you will be having baby and ask them to get bub's hb on a doppler (call first to make sure its not super busy and its OK for you to go at that gestation).

Best of luck

Cheers,

Beck