Anybody work on their feet for long hours?

Hello everyone! I hope everybody had a great weekend!❤️ I'm 7 weeks and 4 days pregnant, and I work at a doggie daycare. This job requires me to be walking around on my feet for 5 hours 5 days a week. 
When I'm working I don't feel tired at all, but I still wonder if this walking is impacting my baby. I really don't want a miscarrage or a torn placenta. This is my first baby/pregnancy so I am super paranoid! Does anybody have a similar job that requires you to be on your feet? Thanks everyone :)