Swollen foot

Nicole • I'm 29 years old, married to my hubby since 2012, together since 2009. Pregnant w/ our rainbow baby due 9/2015!
I'm only 16w+5days, but my left foot is starting to swell and my big toe it swollen and hurts to touch or walk on. I messaged my doctor, but wanted to check if anyone else has been experiencing this. I stand a lot at my job, and my back has been feeling it, so I think that's the cause, but I'm not sure.