Oo, normal lang yan sa 2nd trimester, lalo na around 25 weeks! A few of us moms experienced the same, yung parang gurgling or bubbling sounds sa belly, it's usually just your digestion working or the baby moving around na. But if it's accompanied ng severe cramping, bleeding, or hindi mo feel ang baby movements after, best talaga to check with your OB para peace of mind mo lang, lalo na ngayon na mas malalaki na ang baby at mas ramdam mo lahat ng movements.