I fell down in my 6th month of pregnancy with my son. And i told my doctor after the fact, and she told me the next time i fall to always go in to get checked up on. They aren't worried about the baby, but worried about the placenta. They have to make sure that wasn't damaged in any way.
Go get cheked!!!
call your doctor to make sure. Every woman is different and have different experiences that may not apply to you. Ask for an ultrasound if possible to make sure baby is fine
Call your doctor and tell them what has happened. There is no way anyone on the internet can determine if everything is fine - only a doctor can do this.