First 5 Days of Heartbreak

[FroglovesToad]

Day 1:
Maybe breath is superfluous.   I like the following three lines. I think this line can be changed to fit with the tone of the rest of the lines. 
Anchored to grief like great stones
the lungs collapse
loss constantly arriving
 
Day 2:
Sick with sewage
swallowing boiling anger
there is no room in the kettle of my stomach
for perspective to crest over the burn  This line is so good!
 
Day 3:
When the claxons ring out,   could change to "klaxons"
tamp down the reverberation with my hands
shivers held in place by tight tendons
that pain might not rend them to rags  could change "might" to "may"
 
Day 4:
Who lies to the wind?
Heartbreak floats on it,
featherlight and perfumed like love,
unbothered by its endless circles   I think this format makes the last line hit more, but I like the original format as well
 
Day 5:
Resolution is not
serenity in the filtered sun of empty hallways
but footsteps, grinding and heavy
inching forward one hour at a time These three lines are beautiful, but I think you could experiment a little with the last two lines. 

~This poem seems really polished. I can tell you've put a lot of time into this, great job!! I think you could experiment with changing some parts up to match your own unique voice.