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 emergency care for:
Very heavy bleeding, especially if you are soaking pads quickly
Fainting, marked weakness, confusion or severe dizziness
Severe or rapidly worsening abdominal or pelvic pain
Chest pain, difficulty breathing or coughing up blood
A severe headache with vision changes, weakness or seizures
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 a pregnancy assessment service or healthcare professional promptly if you are pregnant and have vaginal bleeding, persistent pelvic pain or vomiting that prevents you from keeping fluids down.
These symptoms need assessment but do not necessarily mean you have a molar pregnancy.
Fever, worsening pelvic pain or unpleasant-smelling discharge after a procedure may indicate infection and need urgent medical assessment.
The article also says
If you are being monitored after treatment, contact your GTD team if you miss testing, receive an unexpected positive pregnancy test or think you may be pregnant.
Also report bleeding that returns after it had settled.
Every sign above is quoted from the sofidex article on Molar pregnancy. If you are not sure, err upward — it is always reasonable to be checked.