Body Odour After Mirena IUD

Throwaway Account, because I'm embarrassed.

I recently had an IUD (Mirena) inserted after being on Nuvaring for about 7 years. I am now experiencing BO (Body Odour) from both or one of my armpits on a fairly consistent basis. I need experienced this before, I only ever experienced BO in a single armpit every maybe, 6 months, before I switched BC.

I don't want to use aluminum based antiperspirant as there is a history of breast cancer in my family. I do use it occasionally though because it is the only thing that works. My natural deodorants (Tom's) not only do not work but can even make my armpits smell worse now! My workplace is scent-free so it's not like I can load up on perfume to help either. I have tried using Apple Cider Vinegar on my pits after the shower to hopefully create an acidic environment where bacteria cannot thrive. This only seems to work sometimes.

Trying a bunch of natural antiperspirants may end up being a expensive endeavour so I am seeking some advice. Anyone experience this phenomenon after switching BC or to Mirena? Any natural deodorant or DIY recommendations?

Thank you in advance.

Confused Armpits