Contractions @ 27 weeks

I'm 27 weeks today and I like to take daily walks with my one year old. But recently I've been feeling contractions half way through the trail. My stomach gets super tight and a sharp pain starts in my back and circles around to the front of my hips and stomach. So I have to stop and sit down. I've tried everything from upping my water intake in case I was dehydrated, to skipping my walks all together to prevent contractions. But since they started it feels like they happen daily even when I'm not doing anything. I've had a few complications like my hips being moved by the baby and severe migraines. But with my first I didn't have any contractions until the very end even then I didn't feel them. My family tells me I need to stop pushing myself and rest but I can't do that with a one year old running around. I'm really terrified this baby will come early. What can I do?