Never had menses cramps before

Just curious…. My period has been very irregular. Could come 1 month after the last one or 2-4 months after. The longest was 4 months. I have never experienced menses cramps before so I’m not sure how it feels like. Are there anyone that is like me or am I just weird? Hahaha 😅 Am 38 weeks preggy now. I’ve read a lot of mummies saying that labour contractions could start out like menses cramps. But I’ve never experienced it before so I’m just clueless & waiting for any signs of labour to come. So far not yet……….