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 chest pressure, severe breathing difficulty, fainting, sudden confusion, blue or gray lips, or cold and sweaty skin with profound weakness.
Seek prompt medical advice for rapidly worsening swelling, repeated dizziness, new palpitations, or breathlessness that is getting worse.
After hospital discharge, follow-up usually focuses on the cause of the shock, recovery of heart function, and effects on other organs.
Visits may include a review of symptoms, blood pressure, heart rhythm, kidney function, and all medicines.
An echocardiogram may be repeated to see whether pumping strength has improved.
At routine appointments, report increasing fatigue, swelling, reduced exercise tolerance, dizziness, or a gradual rise in breathlessness.
Ask how to monitor weight, blood pressure, pulse, or fluid intake if these measures are part of the discharge plan.
The article also says
Do not restart, stop, or change heart medicines without speaking with the treating clinician.
The appropriate medicines depend on blood pressure, kidney function, heart rhythm, and the underlying diagnosis.
A medication list should include prescriptions, over-the-counter products, vitamins, and supplements.
Cardiac rehabilitation may be recommended after a heart attack, PCI, bypass surgery, or another qualifying heart condition.
It combines supervised activity, education, and support for reducing future cardiovascular risk.
Recovery may be gradual, especially after a long intensive care stay.
Every sign above is quoted from the sofidex article on Cardiogenic shock. If you are not sure, err upward — it is always reasonable to be checked.