Noticing a sweet, almost like syrup smell on my underwear and pads

I’m 35 weeks pregnant. This has been happening for a couple weeks, but I thought it was just the way the panty liners smelled 🤷🏻‍♀️ dumb I know. I didn’t wear one last night for the first time in a while and my underwear smell the same. I have weekly ultrasounds to measure fluid and haven’t been told there’s a problem. I don’t notice any leaking either, but I do pee a little even from just walking around. Anyone have a clue what this could be? I don’t have diabetes, or at least I passed my test at 28 weeks.