a week before period but (I think) positive test?

Jen
Hello,
I'm due on on Friday but about 4 days ago I had a very very faint positive in a first response. I then tried again the next morning and got a negative. Anyway, I tested twice this morning and got 2 very faint positives on a cheap Amazon test, then this afternoon got a positive on a cheapy superdrug one. Is it possible to get positives so early without first morning urine? I want to do a clear blue digital this afternoon to confirm but I'm nervous I've had false positives...anyone else has this?
Thanks in advance 

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