Feet swelling already?

Hello! I'm 21 weeks and I've already started to experience my feet/ankles swelling. It's mostly towards the end of the day (I work sitting at a desk all day) and they always go down overnight. I prop my feet up under my desk but that doesn't seem to help.

I'm drinking tons of water but maybe there's something else I can be doing? I'm not concerned yet because it's only been my feet/ankles and it doesn't happen during the weekend when I'm not sitting all day.

Anyone else experiencing this yet? I feel like it's so early! Any tips on preventing it or am I doomed until birth?!

Thanks! 😁