Swollen feet

So I have a blood pressure machine and anytime im on my feet now this past week my feet get so swollen looking like sausages its crazyy. I have appt friday. I havent gained more then 5 lbs.

I remember with my first i had to get shoes 1-1.5 size up but I had a physical job. My 2nd I was on my feet all day too. This time no physical work and I am my biggest. I gained 50+. My youngest is 5.