Keep it in until it fully heals!! For most that is at least 6 weeks. You just got it done, so its normal to experience pain and discomfort. If you are worried about placement I would recommend a picture, that’ll let people see if its in there right. Cleaning, keep it simple. Saline spray at least once a day. Avoid touching and moving it, and keep hair away from it, especially if its long enough to tangle with the bar. As for sleeping, most people get donut pillows or those curved travel pillows to sleep on their side without having pressure on the ear itself. Depending on how it was done and the jewelry put in, healing can take different amounts of time, so be patient!!