This is not a letter that is very commonly used in the English language, but it is considered as a symbol and when it appears in a dream, it means the desire of reaching the unknown.
Dream dictionary: bieno he soñado k estaba con mi novio en su casa y dream meanings
(arb. See Gutter of Mercy)
Symbolizes your desire for a dilemma in your life to come to an end. You want to reach the union of contradictions.
The letter y indicates the questions you have. The y is also a symbol of fork in the road.