How “sudden” is the swelling in preeclampsia?

I’ve read that “sudden” swelling can be an indication of preeclampsia, but how sudden are we talking? I haven’t dealt with swelling really so far but I was just sitting down at my desk for a bit and when I stood up, my feet and ankles were incredibly swollen and my shoes wouldn’t fit! It was painful to walk to the other room where I could lay down and put my feet up. Is this normal? Or would this be considered sudden swelling? I’m 35+5, FTM, and haven’t had any significant swelling until now!