Constipation

It

So sorry for the TMI but I’m desperate for relief. I’m suffering of severe constipation. My stomach hurts so bad from it. I’ve tried Miralax, prune juice changed my diet, drinking almost a gallon of water and walk 30 mins a day nothing is helping 😩😩 . Only thing i haven’t tried is a stool softener. Anyone know tried a specific one that helped them?