Period/Pregnancy Question Please Help!?

I thought I was having my period last week.. it was kinda brown... never too much. But as the week continued on and the flow never got heavy or bright I started to wonder. I took a pregnancy test today and it was a faint positive.. then later this evening I took another to see what it would do.. and it was a brighter more obvious positive. When I wipe now it's just barely a little bit of light brown. Is this normal? I know some people bleed throughout.. I'm just wondering if this is anything to worry over. I have had 2 miscarriages in the past. Thank for the help!