I am the same way, but it's more like coffee makes me go in the morning. Not necessarily it makes me go all the time, but once everyday for sure. AMOF until I get my morning coffee, malaai "dui numberi dhanda" garnu nai pardaina. And I drink coffee like all day ( about 4 instant coffee) and I am totally fine with it.

PS: My dad was the same way ( he would have to take his tea to do his "dui numberi dhanda" :).

Mine is not upsetting the stomach and if such is the case I would say it's pretty normal.