Uy, kapit lang mama! Constipation during pregnancy is the worst, a few of us in my mom group dealt with this din, especially around mid-pregnancy kaya totally gets it. What really helped was drinking SO much water throughout the day, eating lots of fruits and veggies (especially papaya and prunes, sobrang effective!), and moving around kahit konti lang, even just walking around the house helps. Some of my friends swore by taking a stool softener approved by their OB, kaya I'd definitely ask yours kung ano safe for you ngayon at 25 weeks because they can recommend something na hindi harmful sa baby. Hang in there, it usually gets better once you find what works for your body!