Hi Mujhe February Me Period Aya Tha Aur Ab April

hi mujhe february me period aya tha aur ab april start hogya par abhi tak mujhe m.c. nhi ayi .acctually mere and mere bf k bich physical reltionship bna tha 20march ko but abhi tak mc nhi ayi.maine pregnency test kiya but negative nikla .maine contrapill kit ki medicine ek kal khay aur 400mg ki 4 tablet aj khayi par abhi tak bleeding nhi hui ap ye btaie mujhe smjh nhi a rha kyu mc nhi a rhi .mujhe vomating bhi 7 bar hui hai .jb pregnancy test negative h to kya mai pregnent hu.mujhe dar lg rha h kya ap meri ashanka ko dur kr skte hai sir plz tell me