Help! Dog jumped on my belly?

Lindsay • married to a wonderful man, have 2 angel babies, and pregnant with our rainbow baby boy

So I'm 21w and 4d and my friends pit (not saying anything about the breed, I love pits just trying to give a size referance) just jumped and stepped on my belly kinda hard. he was trying to jump off the couch. do you think he hurt my baby? Should I go to the Dr? What are signs that something is wrong? Sorry I'm just a worried ftm.