TMI change in BO scent???

This is going to sound gross and I'm sorry, but does anyone know what it means when the scent of your sweat changes? Everyone gets sweaty and stinks yeah, yeah, but the scent of mine has recently changed and is like sweeter if that makes sense. It's almost sickly sweet. I am ttc could that possibly be a symptom of pregnancy? I know increased sweating can be, but what about the shift in scent? Any advice would be great please let me know if you know anything ir experienced this