Is it normal to have like cervical cramps at 31 weeks?

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Is it normal to have like cervical cramps at 31 weeks? Sometimes I feel like I'm having added pressure as if I'm about to pop. Like as if my water is going to break. But, I'm not having painful contractions?🤷‍♀️ ::confused:: Just lower belly cramps.. It started after stressing out about personal issues and happened again after carrying heavy groceries home because I dont have a car... Am I going to give birth early. I really don't want a premature baby. This is not my first baby. This is my 3rd but, the last time I gave birth was 14 years ago... Both my kids were full term and healthy. I never had a premature baby..😥 This is messed up😢