7dpo heartburn - 8 months PP

Ra

Hello I’m 8months pp and currently breastfeeding (pumping) only twice a day. I’ve seen a drastic drop in my milk the past 2 days and I’ve had the worst heartburn it’s bringing me back to my pregnancy days 🤢 could I possibly be pregnant again I never had any symptoms last pregnancy besides missed period. Isn’t this too early for symptoms ?