Need opinions please

Ma

So my AF was due 10/27 took a pregnancy test and had a noticeable faint line and was told it was positive then 10/29 what I think was my period came lasted until 11/1 heavy all 4 days but now I’ve been having cramping on my left side and back pain and soreness on my breast took another test and a bit darker line showed up. Could it be that the 4 days I bleed wasn’t my period ???