Pregnant by a possession

What if Ron had the courage to ask Hermione to the Yule Ball? What if Ginny introduced Neville and Luna to eachother? What if Neville asked Luna to the Yule Ball? What if, when Harry asked Ginny to the Yule Ball, she didn't have a date, so she said yes? When a spell goes wrong a pair of ghostly lovers possess Harry and Ginny. The ghosts are very excited to be in possession of bodies again- and make full use of them. Now it's a month later and Ginny's period is late. Accidental Pregnancy.

✔ Harry is 14, Ginny is 13
✔ Ghost possession leads to an accidental pregnancy
✔ Ron asks Hermione to the Yule Ball
✔ Neville meets Luna through Ginny and asks her to the Yule Ball
✔ Harry asks Ginny (she's free, she says yes)
✔ Set in Fourth Year, starting the night they return to Hogwarts
✔ Triwizard Tournament still happens
✔ Lots of drama, romance, angst, and magical complications