27 weeks driving on bumpy roads

So we live in a small town with a lot of dirt roads. Something that we've always done is ride around on back roads. Is it ok getting bounced around due to the bumpy road for a while at a time? I was only crampy when we were going over bumps and I had to pee other then that it was just uncomfortable at times. I've looked this up and everything I've read seems to be ok. I mean people life weights while pregnant, run and so forth. I think it's fine just didn't know if anyone else suggested anything!!