Six days late and spotting

I have had two pregnancies. With My first pregnancy my period was a few days late and tests were negative. I had a feeling I was pregnant but had two “periods” before getting a positive test and a couple of weeks later I miscarried at around 9 weeks. My second pregnancy gave me my now 15 month old daughter and I was able to confirm I was pregnant before I missed my period. Now, I am 6 days late, experiencing tender breasts, cramping in my left lower abdomen, and fatigue. My tests look like they could be faint positives but I think I’m getting line eyes. This morning I started spotting and the blood goes from a very light pink to a dark brown. Could I still be pregnant? My periods are very regular.