I don't get it

Heartbroken .. Last 3 days I wake up at 5am with nausea , heartburn pelvic cramping, headaches , lower backpain.. Get 3 positive Hpts with 8 days . Go for blood work and it's at a level 4. I don't get it. I'm so sad. Period isn't due till march 20th but seems like no matter what it's not happening for me