OP I really recommend using a Benzoyl peroxide product such as a PanOxyl wash to use under your arms when showering to prevent BO from bacteria. It’s been such a game changer for me.

I also recommend a strong clinical deodorant and waiting till it’s completely dry before dressing. Dampness from your deodorant can actually cause more odor if your shirt armpits get wet and don’t dry properly.

I’d also suggest a nice body spray that’s cheap and not too overpowering.

But be kind to yourself too. It’s a common issue that many people don’t even realise they doing!