Swollen foot and leg one side

mom2W

Over the weekend, we took a trip 2 hours away. I walked alot and that night both my feet swelled. Today, they arent swelled as much but my right foot and some of my leg is more swollen than the other. Also, I have some redness starting at my ankles and going up to the middle of my calf on both sides. I have a little more pain in my right side though. Is this normal? I plan on calling my doctor in the morning but didn't know if this was something urgent or if this happened to alot of people