No positive no loss

Hi, I have had a miscarriage and chemical pregnancy within 8 months. Doctors say I am healthy. I am m now 4 days late and c n feel my breasts when I walk. In one weeks time i should test, but I am scared b cause what happens if I see that positive sign again and then 48hrs after I have have another miscarriage. It’s like if I don’t see the positive it’s not real and if I ooose it again the moss won’t be real.

It’s a bad way to think. I understand this.