There are three doors
Every health problem in Norway enters through one of three doors. Choosing the right door is most of the work.
113 is for life-threatening emergencies. The operator (AMK) sends an ambulance, a helicopter or a boat. Say the place first, then what happened.
116 117 is legevakt, the out-of-hours doctor. Use it when you are sick or hurt and it cannot wait until your GP opens. It works everywhere in Norway; the call is routed to the legevakt for where you are.
Your fastlege (GP) is for everything else: ongoing symptoms, prescriptions, referrals to specialists, mental health, certificates. Nearly everything starts here, including hospital treatment, which needs a referral except in emergencies.
Say it in Norwegian
Jeg trenger legehjelp.
I need medical help.