Six days!!! fingers crossed

we have been trying for a baby for three years now. three miscarriages later we decided recently to take off the hold and try again. our ovulation window was filled with "activities" and we are so hopeful that we can have a positive followed by a pregnancy that last past 16 weeks 😭 because after three, I can't do it again. I get extreme sickness to the point of kidney issues and shortly after my body goes into shut down,and baby is gone. after three times. please pray we can have a baby, and we are positive. Any and ALL tips from experienced mothers who have suffered this severe sickness that can't HARDLY BE JUST MORNING SICKNESS, I am open. and so eager. and so ready.