scared about side effects of after pill for my baby

Hi,
Welcome to ehealthforum,
You can experience contraceptive failure. The bleeding/spotting that you experience could be due to decidual bleed. If you are worried, go ahead with getting serial HCG levels estimated. Doubling up of the hormone levels in 48-72 hours will show that pregnancy is going on smoothly. An ultrasound scan done will also help to confirm gestational age of fetus/baby along with fetal wellbeing and viability. Based on the examination findings and investigation results, your doctor/gynecologist will decide if pregnancy is going on smoothly or if there is need for MTP (if there is subchorionic or retroplacental bleed, declining HCG levels, or if pregnancy is not viable). Be in regular monitoring and follow-up with your treating doctor/gynecologist and report any new/abnormal symptoms immediately. Drink plenty of water. Take adequate rest. Maintain healthy diet.
Take care.