It is a good idea to have someone drive you home as some people feel dizzy or faint after an IUD insertion. While it is generally safe to return to work or school right away, a person may wish to take a day of rest and recuperation if they are feeling intense cramping or pain. It is also normal to notice some spotting following the insertion of an IUD and can last 3-6 months. IUDs only protect from getting pregnant and cannot prevent STIs, so for your health, it is important to continue to practice safe sex with new or untested partners.