Need some input! Swollen feet

Kerry • Mommy of 2 special little boys!💙💙
I went to the doctor today for my 39 week appt. I'm 39 weeks tomorrow. I been having more selling of the feet and ankles and I mentioned it to my doctor and he looked and agreed. He also took my bp which was 120/84. My whole pregnancy it's been 110 or 120/ 70. He told me he was going to take some blood work and wanted to see me back tomorrow. Any idea what he may be looking for? I was also 1 cm dilated and 80% effaced which I was last week. Now since being home my feet are getting so much worse and having lots of cramping. Is the cramping from my exam though today? Should I be concerned with the swelling and has anyone else has a similar situation?