Husband has Nasty staph infection... please help to ask dr. questions

shyshell

my husband got this NASTY sore which looks like it is eating his skin...dr. says ist is a staff infection and gave him a shot, I forgot the name of the shot but she said it was stronger than penicillin...he says it hurts he has diarrhea,vomit and the redness is just spreading and the sore is black,puss and yucky looking....I think it is related to necrotizing soft tissue infections. can I be right and what do I tell the Dr.?
last night found two more pimple red spots on his leg and one on his arm. as the one on his leg got which turn real nasty and black/puss in a quick time.
what I found on the net:

Staph Sepsis
Staph sepsis generally occurs when the staph bacteria enters the blood and can be fatal.

Symptoms of staph sepsis are:

Sudden fever or hypothermia
The patient can feel extremely weak and suffer from diarrhea or vomiting and nausea.
Increased heartbeat and hyperventilation
Symptoms of other already affected organs become intense.
The other symptoms of sepsis can also be blood clothing, low breathing, and limited urination.

Necrotizing Soft Tissue Infections
Caused by Staphylococci bacteria, Necrotizing means premature death of cells and tissues. However, few other bacteria can also cause this disease.

Symptoms can be a red bump or red spot which gets transferred into painful black patch with the fluid pus. Interestingly, it can develop within an hour. The other general symptoms are similar to sepsis. It does get cured naturally and one needs to visit the doctor to avoid any fatal complications.