Help please

hard uncomfortable lower abdomen mostly on my hips, hurts to poop, when i poop i feel constipated, and only get diarrhea, and it’s dark and sometimes liquidy, and when I pee the toilet paper is kinda yellow, eating habits come and go, feel tired constantly, my stomach has gotten has gotten bigger, had sex 2 1/2 weeks ago.. 🤷🏼‍♀️