Kinda worried..

Ok so this seems weird to me. I took first response pregnancy test on Oct 3 n it was positivr but so faint I barely saw 2nd line, so then I took a clear blue digital test and it said pregnant 1-2 ok so for about 3 days I had some spotting the doctor said it's normal and not to worry. So just curious today I took another clear blue test 10 days later, it still says pregnant but still says 1-2 and I was expecting it to say atleast 2-3 so I have an appointment scheduled for Oct 25 but it's so hard to wait that long, does it sound like I should be worried? I'm trying not to stress since I've had 1 miscarriage already early this year.