After 4 days of missed period, blood test for pregnancy is done.but it was negative.no period untill now.we are trying to conceive.can still b pregnant?

Can I be pregnant?: In this case only and not for general population i would do one more test. Please wait two days after the last test. If you are still negative it may be time to get to the OB to figure this out.

Clarification: What does 'no period until now' mean. If it means that your period was late but that you now have it - you are not pregnant. Late period reasons: low body wt, obesity, weight ^ or v, ^exercise, endurance athletics, breast-feeding, stress, illness, eating disorders, anovulatory cycle (no egg released), travel, perimenopause, just starting menstruation, hormone irregularities, drug use, meds etc.