i m confussed

hi its me khawish my question is that i have compeleted 3 months of my marriage and i have menses 4 fifteen days 2 month some brownish bleeding i have take pill before marraige 4 menses because my marriage date is near and i have late in my menses i never have sex b4 marriage now i have third month of marriage and i dont have menses only 2 days late can i be pregnant?i have pregnancy test in revious month i m negetive plz tell me soon as soon as possible