I know it's scary to get random conditions (as you get older it gets easier because you get used to it and no longer fear the worst every time something happens).
Speaking as someone with a fair number of non diabetic random conditions I want to reassure you that no you don't have to assume that the worst will happen as regards diabetic and nondiabetic complications.
As a long term (52 years) T1 still in good health and with a T1 mother who died at 78 (basically of heart/lung issues caused by 50 years of smoking) I want to reassure you that diabetes can cause health issues but it doesn't have to.
And I genuinely believe that diabetic treatment for today's young diabetics means that their future options are much better than for my mother or even me.
Virtual hugs.