I Am A 23yr Old Mom With A 8month Old.

I am a 23yr old mom with a 8month old.
For lunch I had a salad that was somewhat questionable but ate it anyway and then had pizza for dinner. I usually only drink coffee but today I drank a bottleof water also. I don't know if my issues could be from this. However,
Late this evening I had a hungry feeling but wasn't hungry. Once I sat up in bed and got a bottle of water, the hungry feeling turned into severe cramps in my lower abdomen and nausea. I attempted to use the bathroom and couldn't, and felt quite constipated. At this point I have chills but no fever. I was sitting up in bed and all of a sudden I heard and felt a gurgling in my left side, and it felt cold. Since then, my entire abdomen feels slightly cold , with it radiating from the left side right under my ribs. The gurgling happened two more times with the cold sensation. I began to have severe cramps and then felt the urge to go the the bathroom again. This time it was yellow grainy looking diarrhea and it had what looks to be small random shapes of stringy red. Almost like pepper flakes? I didn't have hemorrhoids before/after I had my son. I'm unsure about the red blood color. And I've certainly never felt gurgling in my side. After using the bathroom the cramps subsided mostly but still feeling shaky/chills and cold in my side. What is wrong with me?