What are the chances of brain eating amoeba in week old tub water?

Long story short my landlord is a POS, my bath tub is clogged and has had water filled in it for over a week now. I tried emptying some of it out today with a bucket. Now im freaking out cause I took a shower in it afterwards with water still in there and then realized I never washed my hands after emptying out some of the water with a bucket and had my hands all over my face and up my nose after that.