Anyone have problems ttc after they stopped b/c????

Jessica
Me and my husband are ttc for our first child. I stopped birth control at the end of Novemeber 2014 and have been trying since then...i had my first period after bc last month in February and i thought my body was regulated...unfortunately this month, march, i didn't get my period at all and i took a pregnancy test and it came back negative...does anyone have any advice..? Do you think im still regulating? Or could i still possibly be pregnant? Any help would be appreciated! Thank you in advance and have a great day! :)