This flowed very naturally in my opinion; I don't know rhyming or meter well but to me you kept it simple yet conveying a lot between the lines in expressing that feeling of being hollow inside, empty.

I like the ending too, a bit of hope and desire, just having that one thought on your mind that the next day will bring something new (no longer filled with fear). There was actually a lot left unsaid that had me wondering, which I love how you don't give details/background who the "you" is... but I definitely felt the panic almost of him/her, and how they consistently feel trapped.

Good poem, keep writing!