Hello, I Broke My Shoulder In Four Places A Week

Hello, I broke my shoulder in four places a week ago and am having shoulder surgery in two days. I can't lift my arm at all and therefore my armpit is never getting aired out!! I wash it when I shower and even just throughout the day. It's very painful to move my arm enough to wash my armpit but I know I must. Well my armpit has developed the worst odor I have ever had come from my body!!! I literally don't sweat much and hardly ever have BO. But due to not being able to lift my arm that side is nasty!!! Even after I wash it it's putrid! Nothing helps! Even the washcloth and towel I use to dry it wreak after I wipe my armpit!! I have used essential oils, soap, etc and it still is aweful!! What can I do here to get this odor away?? Is this normal for broken shoulder patients?? Am I going to get fungus or something under my arm?? It's really freakin me out!! Thank you for your help!!
Brittany