Dear! Welcome to HCM! Yes my dear these are the most common side effects of morning after pill. You might find yourself feeling queasy and some women throw up after taking emergency contraceptive pills. You might also get a headache, feel tired or dizzy, have some lower abdominal pain, or find your breasts are more tender than usual. If you do feel this way, it should stop within a day or two. but if still you vomit you can take some antiemitic pills (anti-vomiting pills) which dont need any prescription from the market. Some women also find that the pills cause unexpected bleeding; this is not dangerous and should clear up by the time you have your next period. The pills might also cause your next period to come early or late. So dont confused these things with pregnancy. Stay healthy and Stay Happy :)