Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Call emergency services now if the person has:
Place an unconscious person who is breathing on their side while waiting for emergency help.
Do not enter an area with concentrated vapour unless it is safe.
And for anyone, someone who:
Contact a poison centre promptly after pine oil has been swallowed, even if there are no symptoms yet.
Do not wait for vomiting or coughing to begin.
In the United States, Poison Control is available at 1-800-222-1222 and through webPOISONCONTROL.
Elsewhere, use your local poison information service or urgent medical advice line.
Seek urgent advice for continuing eye pain or blurred vision after rinsing, extensive skin irritation, repeated vomiting, or a persistent cough after swallowing or inhaling the product.
Routine follow-up is appropriate after the immediate poisoning has been managed if mild breathing symptoms, fatigue, or reduced exercise tolerance are not improving as expected.
The article also says
Do not give anything by mouth to someone who is very drowsy, having a seizure, or unable to swallow safely.
Every sign above is quoted from the sofidex article on Pine oil poisoning. If you are not sure, err upward — it is always reasonable to be checked.