If you don’t know where to call, dial the police on 117 who will tell where to call or directly connect you. If you need ambulance, dial 144.
If you need a doctor, you can also call any normal family doctor. Outside surgery hours, the answering machine will give you the phone number of a doctor on call.
You can also go to the emergency treatment ( Notfalldienst/Urgences) of any hospital or clinic. In French-speaking Switzerland there are special emergency clinics for minor casualties ( Pikett-Dienst/permanence).
Note that even in emergencies, you may be required to show proof of health insurance. Without this, you could in theory be turned away, although this is highly unlikely in a life or death situation.