Constipatiom help

Emily

20 weeks and had constipation on and off since the beginning. Usually stool softeners work but they’re not doing much now. I’ve tried lost of water and eating more fiber foods like oatmeal apples etc. but that’s not doing much either. What else can I do? Is a fiber supplement safe? Gonna ask my doctor when I go next week. It’s o uncomfortable and aggravating 🙄