35 weeks

I have been having on and off period like cramps this week. I mentioned it to my OB today and she didn’t seem concerned or offer to check me. This evening I’ve been trying keep track of them and they’ve been about every 10-15 mins and lasting about 3-4 mins from 5:00-5:40. They have slowed down but every once in a while I still feel a cramp coming on. I’m aggravated because my doctor didn’t offer to check me and I don’t go back until May 11. Should I be concerned?? FTM by the way.