hey Ladies . I had a question I took a pregnancy test on the 4th and it was very light line on it and I was not sure…

hey Ladies . I had a question I took a pregnancy test on the 4th and it was very light line on it and I was not sure what that means ?. but I started my period on the 3th but it was brown and off and on and yesterday too. and today I started it but its light bleeding. and I'm confused ?. with my first pregnancy I had a small period and Its lasted four to five days but I don't know should I be worried about this cause what I saw on the pregnancy test. show I go get checked ?. cause I know it has to be my period cause I have cramps and have all the symptoms:/ . what should I do ?