It's awful hey!! I had cankles from about 30 weeks right up until I gave birth and a few days after the birth until they went back to normal. I remember getting home and looking at my ankles and they looked so much better!!! They were back!

I drank more water, elevated my feet up each evening etc but nope nothing helped me! Hot tub of water with your feet in it sometimes helps.

Try and rest as much as you can and elevate them. And don't walk on them more than you have to... (easier said than done tho )

Good luck hope they go soon.