Blood in stools. Also still no progress!

On 23rd july I have severe food poison severe green stools then I got cured after one week I'm getting normal motion but then I don't know next day after normal have hard stool on day 1 Day 2 its hard at first then it seems to be normal while passing I noticed blood very small amount Day3 its paining around the bowel movement area  then I say blood which is as thin as plastic cover and other one is solid blood but by evening I didn't experienced any pain there Day 4 that is today again  stools and blood even blood and the water came in between its paining and I'm irritated with this as this is not letting me focus on work Note : I am having lot of water my urine is white and transparent No fever no vomiting no weakness Can someone tell me what's happening n any home treatment I'm having butter milk also still no progress