Mama, dahil pregnant ka at may pain kahit intermittent lang, mas safe na iconsult mo ulit si OB mo agad, hindi need to wait pa, para ma-rule out kung normal lang yan or kailangan ng check-up. 23 weeks is a significant time, kaya better safe talaga, 'di ba? One of my mum friends had similar crampy feelings and the doc said it was ligament stretching, pero kailangan i-confirm talaga based sa iyong situation. Call your OB's office kasi sila na ang makikita mo, hindi ako. Hoping it's nothing serious, pero peace of mind mo ang importante right now!