It will take your ears approximately two weeks to heal, given that you follow the care instructions from the place where your ears were pierced. Put peroxide a few times a day and twist earrings so that they do not get stuck in your ears.
You should expect your ear piercing to heal in 4 to 6 weeks. But you have to remember this is just for the ears, other body parts that are pierced heal differently and might take longer. Keeping it clean, rotating it often, and not touching it with dirty fingers should speed the healing process.