I think I remember you or someone else here has a very similar story.
If the infection is in his bloodstream and without antibiotics, he is certainly dying or should already be dead.
You said he won't let you make a phone call, but as ill as he is, I don't know how he could literally stop you. Everything you're doing, or not, is your choice.
It seems like you've decided to accept his impending death and don't want to abandon him, are trying to find the strength to stay and nurse him through to the horrible end. When did you give up on trying to save him?