HcG levels test

I'm going crazy. Even though I've taken 4 positive hpt, my Dr ordered HcG levels tests. Got the lab done yesterday and haven't heard results yet. The Dr. said that ovulation can cause urine tests to show positive. I've never heard that before... Is that what a chemical pregnancy is? I'm so sure I'm pregnant it is frustrating to hear it might not be true. Can't wait to get these test results that will hopefully confirm it!