I've always had a nervous stomach, no IBS that I know of. It's never bothered me, to be honest. My father is like this, my daughter is like this. It's not so urgent that we need to rush to the bathroom, we don't have painful cramps regularly... so it's just a sign we need to address the stress.
My mother, husband and son are chronically constipated. Now that is much more uncomfortable and concerning. I'd rather have my thing