OH MY GOSH I’m so excited because I knew exactly what poem you were talking about simply by your description! It’s written by Shinji Moon, not me. :)
I think that’s a mark of a really great poem, when you can recognize it instantly by just a few simple words. The poem you’re thinking of is here:
http://commovente.tumblr.com/post/41419540546/my-mother-drank-her-coffee-out-of-the-same-travel
(Miscarriage by Shinji Moon)
She is one of my favorite writers in the entire world and one of my biggest inspirations, so I’m glad you’ve discovered her work too. :)