Help!

Nikki
I have taken 3 pregnancy test and all Three have had faint positives. Yesterday I was spotting very lightly (only there when I wiped) all day. But today I am bleeding a bit heavier. Not as heavy as I normally would on a regular period But enough to need a tampon/pad. Has anyone had the same experience during early pregnancy and conintued on to have the baby? I'm afraid that I'm miscarrying and I don't know what to think. I'm stressing over this but not sure if it's even something to worry about.