helppp:(

So I went to the walk in on the 3rd of November to confirm my pregnancy. All they did was a pee sample and yesterday I went to the walk in again after calling my obgyn who I haven't seen yet because of cramping and light bleeding. They did a internal ultrasound and told me it doesn't look like I'm pregnant and doesn't look like a miscarriage due to it not looking like I was ever pregnant. After that they did a blood hcg test and she just called me back saying the test was inconclusive and the levels don't show that I'm pregnant. I honestly don't know how 2 home pregnancy tests and the one doctors one would say positive and all this says negative. Or how I haven't had a period in 6+ weeks. I need help. Could the test not be right or could it be one of those freak cases were I am pregnant just not far along yet.