This is weird. I've been on a 21 day cycle the last couple months, but I'm slightly irregular. It's day 25, and last night, my right breast seemed to be filling with milk and got uncomfortable. I pressed it gently and milk came out, easily, and it had that feeling of needing to be nursed. My left breast was normal. Has anyone ever experienced this? I've been able to express milk since I weaned my son a year and a half ago, but never this easily, and I've never felt it fill with milk like that. What's going on?

I really don't think I could be pregnant. We don't have a lot of sex, and when we do we always use a condom.