Anxiety/IBS/constipation

Hi. I've had horrible issues with constipation since I was a newborn apparently and was diagnosed 2 years ago with Irritable Bowel Syndrome. I was also diagnosed with general anxiety disorder. I do believe my anxiety is the cause of IBS. I'll be constipated for a good 2 days- 1 week before making a bowel movement. The only time I can go is drinking a bunch of hot coffee. But I'm trying to wean myself off of caffeine cause it also causes me to be jittery and makes me anxious. Is there any remedies y'all know I can do to help with constipation?