Ankles swelling

Andi • Just married, loving life with my husband getting adjusted before trying for children
So a year ago I got into a wreck that caused me to have back spasms and swelling in my legs and ankles. My ankles only swell when I sit for long periods of time any thing over an hour and once they are swollen it's hard to get them down. I'm worried because I'm about to leave for my wedding which is another state does anyone know what I can do to help the swelling go down faster so I don't have kankles on my wedding day? Really nervous and don't want the swelling to make it that much worse! Willing to try anything...already tried putting my ankles above my heart for blood flow and it never works...NEED HELP!!!