I hear my ill-spirit sob in each blood cell, (lines 32-33)
Again, the speaker admits to being ill – his spirit is crying. He seems to be jumping out of his skin with sadness.
as if my hand were at its throat . . . . (line 34)
This is an image of self-destruction. If we break it down, we see it's as if his hand is at his own soul's throat – it's a figurative image, but a pretty disturbing one nonetheless.
I myself am hell, (line 35)
Such a sad line! He thinks the worst fate he can encounter is being himself.