Namaste

From what I have read, Samadhi is the state where the mind unites with its object of focus and then duality disappears. I've also read that in Samadhi there is also the sensation of bliss.

A few nights ago I was doing a session of Pranava Yoga (meditating on the syllable Aum) and during the session there was a non-dual experience that lasted for about two seconds. Aum as a syllable or having to do with language totally disappeared; it was not a word but an actual consciousness itself that was vast and everywhere. There was not a sense of myself; there was only Aum, so vast, and silent.

Being that there was not a sensation of bliss during this, is it possible that what I experienced was a pre-Samadhi experience?