Test still faint positives

Theresa

I took 3 pregnancy test 3 days in a row and they all were faint positives. The day of my expected period I spotted and then the next day spotted more with brown discharge, the third day full on red bleeding. Cramping has been mild and on an off. I usually have a heavy 7 day period but this cycle has been different and I’ve been taking pregnancy test while bleeding and I’m still getting faint positives. Today I tried a different brand and I’m on day 5 of my menstrual with 2 more days to go and this is today’s test. I had a chemical before and when I did I tested the same day of bleeding an had a faint grey line but it’s not like that this time and this is my second cycle from my miscarriage in nov. anyone have any idea?