Pregnant but experienced a period while pregnant?!

Geraldine • Mum to be! Rainbow baby 🌈
Who has experienced having a period but felt they were pregnant and were actually pregnant? 
I don't mean implantation bleeding. Some people have experienced having a period while pregnant. I had pinching and twinges in my lower abdomen like my first pregnancy (I miscarried in January and this is my second cycle since) and then my period came. Period lasted 4 days (usually 6) with heavy bleeding and cramping. It's done and I still get the little pinches (less than before though) and I wake up feeling nauseous. pregnancy tests come out negative :/