I was diagnosed Type 11 Diabetes 2005 .  Diagnosed with RA in 2007. Eyebrows were somewhat raised when I suggested back then that my frequent bouts of Diverticulits was the primary cause of my other two diagnoses. In relationship to Helicobacter-pylori I have  never had  any problems however, there appears to be an autoimmune theme running through my family.  
One sibling has Myasthenia Gravis. Another is yet undiagnosed but experiencing various symptoms. Third sibling diagnosed and treated  Helicobacter-pylori but does not have any auto immune disease.