trouble walking?

Is anyone else having trouble walking? I feel like a penguin waddling everywhere and after a few steps I feel so out of breath with my stomach getting super hard. When I finally sit down it feels like I've run a marathon or something. My inner thigh hurts too like right near my crotch only on my left side? Is this because It's my first pregnancy? Everyone else I ask says they don't remember having pains like this with their first pregnancies.