I have has stomach issues for couple years now, had surgery in March 2015 for hemriod repair. Since then I don t poop right. And lately in this month can t go at all, get urge & feel like got go. 2 weeks past & final went was runny & couldn t stop going all day. Now 2 weeks later again after the first time. I finally go again, but only a few pebble like pieces, blackish color, & discharging blood & green mucus. This scares me. And where I had my surgery there is a flap of skin hanging. What should I do???