First aid Self Injury

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So I have a wound that is almost 4 days old.
It's 4 in long, 2 in wide, and about 1 in deep.
I have one round of gauze left to put on it
Also wrap around a ace bandage to hold on
The gauze. I am now completely out of Neosporin. I have very little peroxide left.
I'm not certuan what else I can do to keep it clean, or protected. I did see one of my doctors yesterday. They said other than the fact that its there and why its there. That it looks good at the moment, no infection at the moment. I'm just concerned of how d
Fast it can turn infected if I can't upkeep tge first aid.... Ugh stupid