There are no serious or long-term side effects from taking the emergency contraceptive pill.
But it can cause:
..1..
headache,
..2..
tummy pain,
..3...
feeling or being sick.
..4..
The emergency contraceptive pill can make your next period.
Earlier,
later
or more painful than usual.
It makes periods Irregular and difficult to predict.
This can last for period varying from few days upto 3 months.
Next Steps
"Emergency Contraception" by Dr.Pradeepkumar Sandipan Jadhavar - https://www.practo.com/healthfeed/emergency-contraception-38739/post