Possible IBS?

Over time I have gained alot of food sensitivity. I’ve yet to really pick up on exactly what foods in particular but I’ve got one or two I know for sure anyways. Often times now a while after eating I get an upset stomach and diarrhea. Some days are good, some days sour but ok , some days I feel sick. I get bloated alot. And recently I’ve become constipated for like 2 days. I usually have daily poops. And after I poop my upset stomachs stop. I’m afraid I might have IBS. I’ve tried taking probiotic supplements though I haven’t taken them consistently. Help 😵‍💫