Hello, I've been taking 6 tests for three weeks and four days now, all…

Hello, I've been taking 6 tests for three weeks and four days now, all positive. The digital test showed 1-2 weeks. Today, the test strip is the brightest, could it be pregnancy? Yesterday, I went for an ultrasound, the doctor said there was nothing in the uterine cavity, but something was there, very small, he didn't understand, he said to repeat the ultrasound next week. I'm attaching the ultrasound photo and the test results.