ReTest but don't be too discouraged. I had a similar result on the first test I took. I ended up taking a couple more tests on different brands the same day. I just waited about 4-6 hours between bathroom trips.All were faint positives. The next morning I went with a digital because faint lines can make you crazy. It was nice to just read "pregnant".
I would also retest with a pink test with first morning urine. You cannot trust the test results an hour later.
If there was a line within the time frame no matter how light it could def. be a positive however, I hate blue dye tests they give false positives. Use a pink dye test first thing in the morn like first response early, ive never gotten a false result with it. Good luck.
If it appeared anytime after the 10 minutes (or 3 minutes, whatever the test says) it's considered invalid and is not accurate. Retest in the morning with first morning urine. I'd also suggest a pink dye test. Blue dyes are more prone to evaps and false positives.