OK it's been 4 months since I had my mirena removed and still no sign of a period and all negative HPT help please is this normal I had regular periods before

You might want to head to your doctor to get this checked out. It could be that your body is still trying to recover from the Hormone Infused IUD. You might be able to jump start this with hormone therapy, another birthcontrol as strange as it sounds. It would be in your best interests though to do this medically supervised.