Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
1
Is any of this happening now?
Call 911
Seek urgent or emergency care for severe or one-sided lower abdominal pain, fainting, shoulder-tip pain, difficulty breathing, or bleeding that rapidly soaks pads or causes weakness.
Other emergency signs, for anyone
Someone who is struggling to breathe, gasping, choking, or cannot get words out
Someone who has chest pain, tightness or pressure lasting more than a few minutes
Someone who has sudden weakness or drooping on one side of the face or body, slurred speech, or sudden confusion
Someone who is unconscious, or cannot be woken
Someone who is bleeding heavily and it will not stop with firm pressure
Someone who has had a seizure that will not stop, or does not wake up afterwards
Someone who has lips or skin that look pale, blue, grey or blotchy
Someone who you believe has taken an overdose or swallowed something poisonous
2
Is any of this happening?
Be seen today
Contact your healthcare team promptly if:
You vomit soon after taking an emergency contraceptive pill
Your period is more than one week late
A pregnancy test is positive or unclear
Pain or bleeding after IUD placement is worsening rather than improving
You develop fever, chills or unusual vaginal discharge
You cannot feel the IUD threads or think the IUD has come out
These symptoms need prompt assessment, especially with a positive pregnancy test or an IUD in place.
Every sign above is quoted from the sofidex article on Emergency contraception. If you are not sure, err upward — it is always reasonable to be checked.