Girls, I'm 1-trimester pregnant. I took a test for four days in a row …

Girls, I'm 1-trimester pregnant. I took a test for four days in a row and the test showed 2 lines. It's been a week since the delay, went for an ultrasound. And then the ultrasound told me that you are not pregnant, you have hormone deficiencies, so it prescribed me Dufestón tablets to take for 10 days. If you are pregnant, the ultrasound will show; if not, it will definitely be through 10 days, the period will start ??????????I don't know what to do, please help!