There is a possibility that you had a miscarriage again. The pregnancy
test will be negative as the hormone levels drop very much after miscarriage. Even in the early stage of pregnancy, if the pregnancy is not viable, the pregnancy test comes negative. So, not much emphasis can be placed on the result of pregnancy test. You need tests to detect infections (TORCH), hormonal
assessment, ultrasonogram of uterus
and ovaries as well as karotyping of both partners in view of recurrent miscarriages
. Please consult a Gynecologist at the earliest.