How did you get your ballot to the voting location? Do you have a method to verify that it has been received?
There are vote only drop boxes here set up by WA State at most city halls. They are huge (about 6’ wide, 4’ deep and 4’ tall) painted to indicate they are specifically for votes. They are cleared every night then you can log in and see that your ballot has been received. Image of box here. https://www.wsna.org/news/2016/how-to-find-a-ballot-drop-box-near-you