MCL Injury - can I swim until I get into the Dr?

I raced Sunday - no problems with the 3 mile run. Did a 3 mile cooldown, but no stretch. Later that day I started to feel tightness in what I’m pretty sure is my MCL. Ice and advil since then. It’s not getting any better so I’m calling the doc, but in the meantime…

Can I swim? I know I won’t run and probably won’t bike until I get the ok from the doc, but swimming? I don’t do breaststroke and think I should lay off the fins, but is freestyle for a couple days until I see a professional?

EDIT: Oh, and stretching is bad, right?

Pull bouy. And stretching is fine, just don’t stretch the knee sideways…

it’s hard to hurt yourself further by swimming w/a pull buoy.

but watch yourself around the pool, in the locker room, etc. great place to slip and fall.

-charles