Hello I am 19, and here is a quick story and my symptoms.
Today is Friday and last Sunday I had eaten a pork chop and about three hours later I had bad cramps, However found it hard to pass anything however ended up passing Mucus with bright blood in it. Thinking it could have been food poisoning or from straining, Jumped into the shower. And again later at night I had the same cramps and this time I had some diarrhea and again mucus with blood in it.
Not having a fever or feeling ill other then the stomach cramps I started to think it was odd. However I decided to sleep the rest of the night, Waking up in the morning I had to go to the bathroom with sever cramps, this time no blood at all but a giant hard stool with a lot of diarrhea made me feel a lot better for the whole day. even the day after. And then come Wednesday I had some pain in my lower left side, before it was cramps that moved around from left to right. It feels as if it was cramps or gas , which I have a lot of flatulence but can not go to the bathroom I find it hard to and if I do pass stool it is thin small pieces and one time was mucus again (have not seen again.) the cramps come and go. Also no bloating of my bowls or stomach.
To try and give you more of a location of the pain/cramp it is about 2 inches South West of my Navel (North being my head, West being my left side)
I am not sure if it could have had food poisoning and then came constipation, one thing I do notice is sometimes I feel as if a nerve goes off around my colon and a jolt of pain for nearly a second I could only really think of an Anal fissure. But I am no doctor.
It is an embarrassing thing to discuss or go to a walk in clinic for but I promised myself come this sunday if it is still the same go to the doctor or before that if it worsens. I am not finding myself in sever pain, but rather mild pain and just discomfort.