我正 is not an entry word in itself — it's a high-frequency segmenter fragment from
我 (I) +
正 (just / in the middle of). The full progressive structure is
正在 (zhèngzài) + verb or
正 + verb +
着/
呢. Useful as a recognized phrase pattern when you hear
我正想... ('I was just about to...') or
我正在... ('I am currently...').
