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 for:
These symptoms may have causes other than nocardiosis, but they need immediate assessment.
Seek urgent medical advice if you have a weakened immune system and develop a persistent fever, worsening cough, shortness of breath, or a new painful skin swelling.
A severe or worsening headache, repeated vomiting, balance problems, or changes in vision also need prompt assessment.
If you are already receiving treatment, contact your medical team promptly if symptoms are getting worse, you cannot keep the antibiotics down, or you develop a widespread rash, unusual bruising, severe diarrhoea, or reduced urination.
Routine follow-up is used to review gradual recovery, blood-test results, medication side effects, and repeat scans.
Bring up ongoing fatigue, cough, pain, or difficulty returning to normal activities at these appointments.
Every sign above is quoted from the sofidex article on Nocardiosis. If you are not sure, err upward — it is always reasonable to be checked.