Thanks for the answers! I just found out my mistake tho.
The company i ordered the developer from sent me paper developer instead of film! The bags look quite the same so i can understand their mistake. I have never used d76 developer so i didnt even think that it could be for paper (even tho it says "paper" in the right corner ) but i didnt take notice to it and assumed i had gotten the things i ordered!
Feels good to know the mistake even tho my negs are ruined. I got really confused thought maby my thermometer had gone crazy.