Someone asked me if I’m pregnant again 😒

Okay so yeah, the title said it all. Someone thought I was pregnant again when I am not pregnant at all. It’s just that I still have a “pregnant” belly and it hasn’t snap back. I’m 6 months PP and since the birth of my son, I haven’t really get to work out and eat right yet. Until that question, it pushed me to want to do something about it but my main concern is would that workout and diet affect my breastmilk supply?? Thank you!