Am I in labor?

I’ve had about 33 contractions in the last 6 hrs & they started at 15 mins apart, went down to 12, down to 6-7, 5, now they’re between 3-5. Some are as painful as the previous & others don’t seem as painful. Should I call my doctor? I have no other symptoms. No blood or signs of my water breaking. Just painful contractions & they go up to 5 then back down to 3.