reasons for poop habits to change? TMI

so i would usually go once every 2-3 days, and every once in a while everyday. tmi, but they would be pellets, it would hurt to come out. for the past 1-2 weeks, my poop changed out of nowhere? i have gone 3 times today, and they were really thin and soft. i’ve had diarrhea once or twice in this time frame. i’m also having bad gas and some stomach cramps. i also sometimes go to pee and i all of a sudden realize i have to poop... lol can someone help me with what i should eat or stop eating? 😂