Are you sure you have had a miscarriage this time as some women do experience some bleeding when their period is due for a couple of months
I would go get your progesterone levels checked as you may not have enough of this hormone to sustain your pregnancies, alternativley you could go to an acupucturist as are able to thicken your uterine lining to sustain a pregnancy, hope this helps
i went away for 2 weeks after having my 2 days bleeding,i had already had a miscarriage at the end of march after being 8 weeks pregnant
you maynot have enough preg hormone for the preg test to pick up yet, maybe go for a blood test instead