help please no rude comments

My period is now a week and half late, my sides have been cramping, I feel sick to the point I get really dizzy and just want to either go puke or sleep, I've been having a lot of discharge (that's kinda watery and milky), my migraines get really bad. I have taken pregnancypee  test which come out negative but I have also done a pregnancy blood test for my doctor and that came out positive. I'm not sure what going on but could some help because this is different from my pregnancy with my daughter.