Sis, yan na talaga ang time to see your OB ASAP, kahit ngayon pa lang if possible, or go to the nearest hospital if you're feeling worse. Hindi kami dapat mag-assume dito kaya kailangan talaga ng doctor to check you properly.
25 weeks is still critical, at ang mga changes sa belly at feeling na parang lalabasan need professional eyes. A few of my mum friends had similar concerns at lahat sabi nila, best decision nila was to get checked right away para ma-rule out kung may concern or just normal pregnancy changes. Wag mag-antay pa, sis, peace of mind is worth it!