Living with not dying from disease

It's probably completely unproductive, but I sometimes think about what my life would be like if I was never told I was dying. If I went to an actually competent dermatologist, I never would have heard it. I'm struggling at the moment because I'm really starting to figure out what I want to do with the rest of my life. At a certain point I didn't even think I'd make it to college. But I'm here and I'm mostly healthy. However, the what-ifs and questions still haunt me.

What if I had never heard I was dying?
Would I be better prepared for my future?
Would I be able to better function in relationships?
Would I still be the same person?
What if I didn't graduate?
What if I had dropped out of school because I was so sure I was dying?
What if I had made all the bad decisions that were presented to me my freshman year in high school?
Would I have gone down the same path as my one time sort of boyfriend?
Could I be in jail right now for the decisions I had made?
Would I appreciate my life as much as I do if I didn't think I could lose it?
Would I love as hard as I do?
Would I take as many risks?
Would I say the vast amount of stupid things that I do?
Would I still have my semi-black sense of humor?
Would life just be easier?

I know that all this isn't exactly helpful, but sometimes it creeps into my brain that everything might be so much better if my doctor had never lied to me.