Here you can see if Situs inversus can be hereditary. Do you have any genetic components? Does any member of your family have Situs inversus or may be more predisposed to developing the condition?
I was not diagnosed until I was 48 and this was only because I had a CT scan for pain on the left lower abdomen which turn out to be diverticulitis.
I knew my stomach was on the right as I had a barium meal X-ray done and diagnosed with hiatus herni...