Am i Pregnant?

Hi . my husband and i are TTC. I've missed my period for 3 days and till date i am still having white discharge instead of my period coming. I've been feeling nausea 1 week before my period as well. I tested with the pregnancy kit 1 day after i missed my period and it was negative. Am i testing too early? *note my period has been very regular. Recently i've been taking the Blackmores Conceive Well as well, i saw some use mentioning that this will cause delay in the period? Can somebody advise me. Thanks!