Mattress protection?

I’ve started worrying about going into labor while I’m sleeping and destroying my king size mattress. So much so that I planned to start layering towels under my sheets next month. Any STM have suggestions?

Fast forward to last night...watching tv in bed, wondering if I should pee again b4 calling it a night and POW! Little man kicks me hard right in the bladder! He hasn’t kicked so strong in days, and I was just saying to DH I think he dropped as my belly felt way more in the way when doing stairs last night.

Anyway, I nearly piss the bed and say “holy shit!” as I break for the bathroom. Not screaming, but startled lol. But Waking up poor DH who is like what happened??? On more than one occasion lately, me cursing and him asking what happened meant I pissed myself but usually bc of a sneeze 🤧🤷🏻‍♀️.

So anyway now I’m thinking maybe that spare waterproof crib mattress protector should live on my side of the bed a while for reasons other than labor 🤣😬