35 weeks having contractions.

Woke up this morning having contractions for the first time.. they were super close together so I went to the hospital. Wasn’t dilated and water didn’t break but I was contracting. They gave me fluids and it got much better so I’m home now. But I’m having slight contractions again. What could this be? I’m really worried and wondering why I’m having contractions. Should I drink more water and rest? Has this happened to anyone? I don’t want him coming right now 😩