I'd probably be dead, as the Soviet health care system wasn't exactly optimized to care for people with cronic conditions like type one diabetes.
As for what I'd do, that's far too broad of a question. Did they take over the US in my lifetime? I'd probably have died during the invasion, under the logic that since I was a dead man anyway, I may as well take a few Russians with me.
If it had happened in the 1950s, I would be a vastly different person. I would have grown up in a nation that controlled information to the point where 'thinking outside the box' would be extraordinarily challenging, due to a lack of differing viewpoints to consider. My inquisitive nature and lack of comfort with the party line would have gotten me flagged before I ever left high school, so the chance of getting out of a dead end job would be nil. I doubtlessly would have joined the Party, since it was pretty much mandatory, but I would have sat in the back and shut up.
So, before my diabetes killed me, I would have worked as a retail clerk, drank a lot, and thought forbidden thoughts in the dark... but ultimately died, lonely and alone.