Need some advice

I’m very early in pregnancy , early enough to not see anything on ultrasound. I got faint postive on Tuesday . I Wednesday I was having some crAmps with light brown discharge when I checked my cervjx . It has stopped . I’m having slight cramps abc when I went to the bathrooms I seen like a tissue with brown blood in it . I’m not bleeding . Could I be having miscarriage or it’s something normal.