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 exposed person:
And for anyone, someone who:
Contact a poison information service promptly after any paraffin or kerosene ingestion, even if there are no symptoms.
Have the container or product name available.
Do not wait for coughing or breathing trouble to develop.
Seek urgent medical assessment if coughing, choking, vomiting, wheezing, fever, chest pain, unusual sleepiness, or breathing difficulty occurs after exposure.
A mild cough that is steadily improving may be discussed at routine follow-up, but new or worsening breathlessness needs urgent assessment.
The article also says
Do not enter a fuel-filled or poorly ventilated space to rescue someone unless trained and properly equipped.
For skin or eye exposure, get medical advice if pain, redness, blurred vision, blistering, or irritation continues after thorough rinsing.
Every sign above is quoted from the sofidex article on Paraffin poisoning. If you are not sure, err upward — it is always reasonable to be checked.