Washington takes 10 weeks, if you're lucky. My suggestion for the Thurston County protocol test is; get a copy of the protocols… Study them, have a friend quiz you on them, study them again. Then take a couple of days off, have a friend quiz you on them, study them again.
From what I remember, with the BLS protocols, everybody fails them because you have to specifically list all of the details in the protocol. The Thurston County paramedic protocol test was one of the most difficult I ever taken.
But, don't sweat it. Since everybody fails them, you'll get another chance. And, you'll get a look at the test.
Good luck, let us know how it goes