Hi, I have a similar problem, except i'm even older than you. When I was approaching 30 I had severe anxiety about my health and I wondered if it was because of the looming milestone. At the moment i'm 33 and I wonder if it will be even worse when I approach 40.

I'm also considering becoming a mature age student as you have just become, and again the consideration is that i will be 37/38 when/if I finish the course.

But six years ago I was saying the same thing, except then I would've finished at 31/32 . . . and that means I would've been graduated for 2 years.

My 20s were similar to how I read yours: a complete blur of wasted days. Most of it for me was due to depression, and it's common for people with depression to rue their 'depressed years', even though I am still very much a depressed person.

I certainly feel like living my life to the fullest now, but I guess it has to start with today or tomorrow, etc.

You said you don't know what to do, but you're probably doing the right thing at the moment. Medical school, and living it up in one of the greatest cities in the world.