A reason to Smile

You reach a really good climax here...and the contrast between the build up (quite a pile up of a day, oh dear...it's exhausting to think of it...and that really comes through)...and then...that breath of sweet air moment is strong and clear!  I like the lack of punctuation--it adds to the accumulation feeling...perhaps eliminating the caps at the beginning of lines might add even more?  But I know that's a matter of personal taste and style...I found them a little distracting to the push forward, which is so effective.