Hi Yvonne - you asked " Is there anything out there besides a vaccine to help ensure my body doesnt go septic again?" I would say good body awareness is your best defense.
According to the CDC, here are some warning signs:
What are the early warning signs of sepsis?
The signs and symptoms of sepsis can include a combination of any of the following:
confusion or disorientation,
shortness of breath,
high heart rate,
fever, or shivering, or feeling very cold,
extreme pain or discomfort, and
clammy or sweaty skin.

I would say, given your history, that if you have two or more of these start, or suddenly worsen, it's time to call your doctor right away for advice. That doesn't include just getting short of breath or high heart rate when you are doing chores - that can just as easily be from your deconditioning. But if you get hot or cold, sweaty or clammy or confused at the same time - "there's your sign."

Does a guide like this help ease your mind?
Sue