How can i cope with placenta previa when not at the doctor?

Avoid sex: As long as you are not bleeding, go about life as usual with the exception of nothing in the vagina. No sex, no sex, no sex. Call your provider immediately if bleeding begins, even if it's only spotting.

No way: You have to have a licensed OB doctor. It can be life-threatening to you and your baby not having prenatal care with such condition. You can literally bleed to death. Or your baby would be suffering from not getting enough blood and be delivered dead.