i dont know what to do

last year around this i had missed my period! i did not know what to do so i told my boyfriend and we went out and got a pregnancy test and it was negative! so a few weeks later i still had not gotton my period so i took another one and it was positive this time! i went to my doctor and had a blood test which was negative! me and my boyfriend got in a fight and he told me that i was faking which i wasnt! thats not something you joke about! not even something id like to think about!
now its been about a year and im still with the same person… i got my period last on febuary 11, its now march 28 and i still have not gotten my period for this month! this cant be normal can it? im scared to tell him and have him think im lieing! but i have a few symptoms like i feel sick after i eat, and i keep gettin migraines and im always tired! i really do not know what to do! help please!!!