Trying fiber gummies

I need help. I drank prune juice and took a stool softener with lots of water last night. This morning my stools were a little softer yet I tried to go but I couldn’t pass the large stool that just sat in my rectum. I resorted to using lube on a finger and manually got it out. My stools just sit there but I’m not getting the reflex urge to empty. I’m trying fiber gummies today. This inability to empty isn’t just once in awhile it’s every darn day.
I don’t want to resort to laxatives because I’m afraid of being dependent. I’ve had this problem since my colonoscopy a year ago but it’s worse lately drinking city water at our new home. I need bottled water I think.
Any ideas?