2 Months In A Row Now, I Have Had Severe

2 months in a row now, I have had severe lower back pain. I am 38, no issues, 3 kids. I am pinpointing the pain to my menstrual cycle. Is this a sign that something could be wrong? Cramps and labor with kids was always in my lower back also. It's definitely a new amount of pain though for my cycle (mild compared to labor ha)