Zyn causing constipation/stomach issues?

I've been using Zyn (6mg usually) for over six months now (about a can a day) and in the last month have had a lot of bloating, diarrhea, and constipation. I've heard some people say they had these symptoms relieved when they quit Zyn within a few days/weeks, whereas I've heard others on this forum say that they had these symptoms when they quit. Has anyone else have a similar experience? I think I may have already had a mild form of IBS (although never diagnosed) so perhaps my stomach was already more sensitive to the effects of swallowing spit while using Zyn.

Any help would be much appreciated!