Early labor?

Woke up this morning Will period like cramps that aren’t coming and going. They just feel consistent pains either period like or gas pains from being backed up. I’m 39 weeks 3 days. Supposed to have a dr apt Monday and if I am still not dilated I will be induced Monday night with cervidil. First time mom. So not exactly sure what to expect. The pains I feel are making it hard to sit comfortably.