The pill form of EC is very safe and side effects are not common. It is normal for your next period to be different in terms of start date, duration, and heaviness. Other symptoms may include an upset, stomach, lightheadedness or dizziness, or tender breasts. These symptoms should subside within two days of taking EC. If you vomit within the first two hours of taking EC, the dose will have to be repeated. If you are particularly prone to nausea, speak with your medical provider and they may give you extra pills and an anti-nausea medication, like Dramamine, along with the EC dose in order to prevent this side effect. Taking EC with food sometimes helps as well.
The ParaGard IUD is also a very safe option for EC. Serious problems with IUDs are rare and the ParaGard IUD one of the most widely used types of long-acting reversible contraceptives. Some side effects can include mild to moderate pain when IUD is inserted, cramping following IUD insertion, spotting between periods, and heavier periods. Generally, most of these symptoms subside in 3-6 months or less. Over the counter pain medication can help with cramping.