Is it dissociation?

[Kimasxi]

I've learnt something strange and I wonder what it is. I got some grip on my painful emotions that appeared whenever I judged certain facts about myself. Usually I felt emotional pain, sorrow with an accompanying physical feeling of contraction in my chest. Now, I can somehow not cherish that pain so that is is gone after a moment, but you know what? Then I am in a good mood while feeling physical stabbing pain in my chest. What is that?