extremely swollen feet

Yesterday afternoon I noticed I had extremely swollen feet. More than I have ever had and I didn't even walk around that much. So when I woke up today hey we're still extremely swollen and called the doctors. She told me if I get a headache that won't go away to call them back. But I've been having on and off headaches for the past few days and nausea. I have a slight headache now but idk how long I should wait.