Someone please help me TMI kinda

I've had an anal fissure for over a year now and I'm at my breaking point. I can't do it anymore. What can I do to fix this. My doctor isn't helping at all and I've changed my diet all I drink is water and it still won't go away. I only poop every 4 days cause I dread going so much. I cry every time and hold it off as long as possible. I need help. I feel like I'm all alone in this.