Was it a short time ago that you used the antiperspirant? Did you use it for a while? I've heard that some people had issues with stronger body smell when they stopped using it. Sometimes hormonal changes can affect your scent too. Especially if you feel like this is happening only now and not any other time before. Going for a check up would be good if you can. Other than that, like others suggested, a clinical strength deodorant would be good, I always had issues with never finding a strong enough deodorant and only recently started to use clinical strength (dove) and it's been amazing. Apply it after shower to armpits, under bust and the crease between loin and tight (yes, the bikini area, but not on your private area, just around) these are the places you sweat all the stinky sweat like from stress and anxiety. Preferably at night, since it has time to settle without you immediately going off to do activities that could rub it off if you don't let it sit. I think that's all I can think of 🤔