It is hard to CTB, if you are still (subconsciously) holding on to something or someone, it may trigger an emotional response when thinking of CTB. Sometimes crying is a good thing, a release of emotion, a clearing of the mind. Let it all out, dont worry about why or for how long you cry, Just cry and let all your emotions come out.
When you are ready to CTB you may cry, and that is ok
find your peace, write notes(if its your kinda thing).
I hope you find peace. My PM is open if you need to vent or have questions.