I need help. Please? Very worried?

Three weeks ago today, I thought I miscarried. When I went to the restroom, there was a brown and clear glob when I wiped. However, there was no bleeding. According to Google, a blighted ovum causes little or no bleeding. I just assumed that was what happened and went on with my life. Last night, I was getting sick after eating Taco Bell, which is unusual, and I was having to use the bathroom a lot all day. Every two hours or so. I went and got a home pregnancy test and took it first thing this morning. On this test, if anything shows up in the left window, it is a positive. There was a pretty strong line there. Do you think I miscarried and the hormone is still there? Or do you think I'm pregnant? (The day before the "miscarriage", I took two tests and both were negative)