How accurate is an expired pregnancy test (2 years old)? i used it and got a positive test. is this accurate?

Hard to say: But if it is positive then there is a good chance you are pregnant. I have not confirmed this with the makers of pregnancy tests, but usually tests become less sensitive over time, then stop working all together. This means there is a greater chance for a false negative test as opposed to a false positive test. Best to have it confirmed at your doctors office.

Rather than guess: Just go purchase a new home pregnancy test and use it. They are inexpensive and accurate.