Hi. So I Got My Period 8 Days Early (3

hi. so I got my period 8 days early (3 days after I had unprotected sex ) I bled for 7 days but I didn't have any cramping like I normally do when I get my period . after it stopped I started having a lot of milky white cervical mucus and mild cramping . Blue veins have popped out everywhere on me especially on my breasts . my breasts are very sore and feel full . my areoles have a brown ring around them . now I'm having mild cramps on the lower left side of my back . Could I possibly be pregnant ? If so when should I take a home pregnancy test ?