Heart burn as early pregnancy sign?

Am

Hello, I have pcos so my cycles aren’t exactly accurate, so I don’t know what dpo I am. I’ve taken a few hpt’s and they’ve been negative. But I’ve had such bad all day heartburn. Has anyone had this as an early pregnancy sign? It’s been bad enough to make me cough, which I never do, even when I have heartburn from spicy foods. Help! 🤷🏻‍♀️