Round ligament pains?

I know this isn't a typical early pregnancy sign, but I have been feeling a stretching/pinching feeling when I stand up or move quickly that feels an auful lot like round ligament pain, and I don't know why I'm getting it. I am 8 months pp and haven't had a return of my period (breastfeeding). I have never had full blown morning sickness with previous pregnancies, but for the past couple weeks I've had a weird appetite, cramps, gas, and just a bit of a 'funny tummy'... Without a return of a period, I'm having an international argument over whether I am finding symptoms where there are none, or whether I am taking them for granted because I'm postpartum and nursing. I guess I am just looking for other opinions. And does anyone know what else the round ligament pain might be? Thank you.