***!!!Help positive pregnancy test faded?!?! Turned negative?!?!?! ....,

So about 4 weeks ago I had what seemed to be Ovulation Discharge... I took a PT a week later and the test was POSITIVE but the line faded and turned NEGATIVE.... I STARTED HAVING pregnancy SYMPTOMS.. then received my period... My period has been regular for 3 months now and this period has been on for a week and some days... The first couple of days was EXTREME CRAMPING!! WORSE CRAMPING I FELT IN MY LIFE!! WAS I PREGNANT? DID I MISCARRY? WAS IT A CHEMICAL pregnancy???? HELP? PLEASE!!!!!!