Symptoms when you’re done breastfeeding

Hi yall. I reached my goal, two years of successful breastfeeding! What a journey. We were down to one feed a day, right before bed. I was never over productive supply wise. I’m 3 weeks out from our last feed. I’m not engorged, and things seem to be winding down in my body naturally. However, I’m feeling all sorts of stuff. Higher anxiety, chest pain, almost like burning. But my boobs don’t hurt. It’s strange. There’s not a lot of info out there on what it feels like as your body shifts hormones, and stops producing. I’d love to hear others experiences with this.