I remember reading a reincarnation stories about a vampire that does not gain her fangs for a while until sometime in school. She trains with a goddess in her dreams I think. She even drinks the goddess's blood and gains wing which is supposed to be a bad thing. The only other details I remember is another vampire drinks her blood and it caused to stop aging. And also a duel with a dragon like boy (he also had wings) near the last posted chapter. It also has not updated in over a month.

Just put the title that you think it is and I'll see if it's the right one.