Your molecules got all rearranged. You’re now a half-ghost from Danny Phantom, granting you access to a variety of abilities, and a half-ghost transformation, the design of which is up to you. You can most easily use your powers in ghost form, but with enough effort can use them in your human form.
Your abilities initially start out as flight, intangibility, invisibility, ecto-blasts, and increased physicals. However, as you grow more skilled and older you get more powerful. From your older abilities simply growing stronger, to learning to manipulate ectoplasm like a Green Lantern, and gaining new abilities altogether, like possession, powerful cryokinesis, a ghostly wail that wreaks havoc on cities, and possibly more personalized powers based on your personality or background. You’ll also grow stronger and more versatile as time goes on.