Help please

Clare-Marie • MOTHER OF THREE 2 girls 1 boy 3 angles And a baby on the way due July 2019 Married

Hey lady’s so I had my period from the 14th August to the 20th August not due till the 2 September. I have done pregnant test as having sore Breast and it’s come up with a very find positive but now I have this on my tampon it’s only a little bit and having like type diarrhoea is this normal.