Has anyone had this problem or know what it is?

So I got my period on time but even having it for two weeks. I found this very abnormal so I went to the door. They took a look around and said it was OK. Had me take a urine test and it showed up negative. They also had me take a blood test. Got a call the next day saying the test was positive. I have now been going a week with a brown discharge. I have had 3 blood tests. The first two went up and the new one when down slightly. I took two at home tests which showed up pregnant. I have no pain or cramps. Feels sick sometimes but don't throw up. Has anyone had this problem before or know anything about it?