Does this sound like symptoms of IBS?

sorry gross question coming up.
so i thought i had something bad going on in my colon so got a poop test for blood which came back negative, im 30.
But it seems that my bowels and tummy still are not right.
some days everything is fine then the next day i’m popping tums and pooping flat and big within half an hour of each other.
It seems very dependent on what i eat but is driving me crazy as it seems i can’t eat anything!
does this sound like IBS to IBS sufferers?

Thanks