Tests look like the first day I found out.

So maybe I'm crazy but I still take tests every now and then just to make sure the pregnancy is progressing still. I'm six weeks three days today and I just took a test and it looks just like the day I found out! Test line is as dark if not darker than the control line, but just a week or so ago the control line was barely there cause the test line was drawing all the dye from it. Is this a sign I'm losing the baby? I don't have bleeding or cramping at all, but it scared the hell out of me to see that line. Has this happened to anyone else and the pregnancy was totally fine?