I took a test (yesterday) 7 days before my period was to be due. Well, at first it looked negative in dim lighting and a hard to see verticle sign in brighter light. Well, I looked at it today and the verticle line is darker. But it's been 24 hours since I've looked at it. All of the tests I have taken before, the lines disappear within 24 hours. I'm going to take another test in a week, but would this be a positive with a delayed reaction or could it be the test showing a different sign after so many hours?
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