Cryptograms

My greatest fear, I fantasized:
The days were long, the weeks flew by
Before I knew I was awake
My days were through, it was too late
My greatest fear, I organized
Into something more realized
And now what's left I get to spend
Knowing that its about to end
My greatest fear I can't decode
A cryptogram whose seeds weren't sewn
My last few weeks I irised out
My vision blurred
There was no sound
There was no sound