positive test

I had 2 positive tests on Wednesday, Thursday I done another one and the line was even fainter then Thursday night I started very light pinkish bleeding by the Friday morning it was severe had to put a pad with cramping and been passing little clots along with 2 clots the size of a 50 pence and been bleeding since. I can't retest till Monday but I'm adamant I'm currently having a miscarriage or chemical pregnancy as I was only around 4 weeks :/ xx