i understand that border control is intensified now bc of the nobel price festivities but norway is an efta state and therefore participates in the EU internal market. You probably know this already but one aspect of the internal market is the freedom of movement of persons. So you as an EU national are allowed to enter and leave Norway with your ID card. No one is allowed to force you to stay in Norway against your will. In any case, contact your Embassy or Consulate for help with the travel details or worst case scenario you apply for a new passport . They should be able to give you some more advice. Also, I was wondering if you have been thinking of filing for the E-301 certificate? If you are unemployed in Norway and you don't qualify for unemployment benefits you can ask that any rights you have earned in another EEA country are transferred to Norway.
I hope you are ok..I have been in a similar situation once and I know how scary it is. Keep posting here for support. I wish you all the best.