Help!!!!!!Frequent stomach tightening

I’m 37 weeks today and I have been having frequent stomach tightening. This is my second child but I was induced with my first and had my epidural pretty early so I don’t really know what to look for in a contraction. It’s not taking me to my knees. It’s more aggravating than anything. I have a doc apt tomorrow of course I’m going to let him know. Just wondering if waiting till then is too long. They have been anywhere from 2 min apart to 7 min apart all day. No cramping but I do have pressure down there as I have had since I was 34 weeks. Help! How do I know if it’s a true contraction or not ( I have a high pain tolerance)