Oh honey, you poor thing. How scary. I know how you feel. I landed in Brisbane yesterday and we hit the runway so hard I thought we took a chunck out of the the runway. My first thought was to grab my belly and ask my bubba if it was ok. It was scary indeed. I am sure all is ok. Most Dr will just tell you that your baby is well protected in most falls etc. But please, please be careful from now on and just leave things if your gut instinct says its not worth it!
Take care and maybe go get some foot reflexology or something to help you relax. Stressing about it is probably more dangerous than the actual fall.