Horsey stuff

Jasmine • 17 and pregnant! Still graduating and going to college! I can't wait for my baby boy to get here<3
So I wanted to go riding and they we're not easy to catch I ran after them for a good 15 mins and hard running. Im 24 weeks pregnant but you couldn't tell that. I rode a bit now when I try to stand up I have insane pain in my back and hips and around my belly button. Should I be worried?