Adrienne Rich's A Valediction Forbidding Mourning : Help

Hi there, I have to do a poetry analysis essay for a senior essay, unfortunetly I've never done an essay on poetry before so I was hoping someone coula help. It's on Adrienne Rich's A Valedicition Forbidding Mourning, and I understand that it's a response to John Donne's poem of the same name, but I'm having trouble coming up with a thesis and a general feel for the poem.

Does anyone have any opinions on it? Thank you!
My swirling wants. Your frozen lips.
The grammar turned and attacked me.
Themes, written under duress.
Emptiness of the natations.
They gave me a drug that slowed the healing of wounds.

I want you to see this before I leave:
the experience of repetition as death
the gailure of criticism to locate the pain
the poster in the bus that said:
my bleeding is under control.

A red plant in a cemetery of plastic wreaths.

A last attempt: the language is a dialect called metaphor.
These images go unglossed: hair, glacier, flashlight.
when I think of a landscape I am thinking of a time.
When I talk of taking a trip I mean forever.
I could say: those morntains have a meaning
but further than that I could not say.

To do something very common, in my own way