Thank you all for your responses!
Went out this am and pulled the plug. There was a little pip of ice on the end of it (uh oh!). Still couldn't pull cord. Left the plug hole open and covered it with a cloth. Sunny day, waited for the temp to rise.
Back out, above freezing. Turned off fuel. Drained carb cup and the little fuel cup. Pulled cord and water squirted out of the hole. Kept pulling it until it stopped spurting any water. Squirted some wd40 in there and kept pulling it occasionally while I changed the oil.
Replaced the plug turned on the fuel, set the choke, and pulled until it started. Took maybe 20+ pulls.
Split some wood then turned off the fuel and let it run out. I had stopped doing this as I use it every few days.
Embarrassed that I put the engine through this. I will always turn off the fuel and store it covered in the future. Guess I didn't want to miss an opportunity to be stupid.
Got lucky though. Cost me an oil change that was due anyway.
Thanks again guys!
Live a positive life!