pee tests at Doctors office???

So I got billed almost $800 for 2 lab tests. They asked me to pee in a cup. I assumed it was to test for pregnancy since it was my first visit. Well that test only cost $5. What are the other 2 things they test for?? I was never informed of these tests or that they would be sent out of network.  Ugh!!! 😡😡 ask before a doctors office does anything!!!