Thank you for posting your question here, I will try to answer it to the best of my abilities.
The fact that there is green pus means that in all likelihood there is an infection. While I can understand your reservation for not wanting to go to a doctor, you really must as the situation can only get worse. The fever
is also due to this infection you have.
Best case scenario, there will drain the wound and give you some antibiotics. Worst case would be that it is more than a wound being infected and you require further treatment.
I hope this answered your question