hi, last month posted a question becuz i had a missed my period completley. well i have missed 2 periods now, bt lst mnth i took 2 hpts n they were negative. im booked in to c the doctors nxt monday bt im soo lost. can i be pregnant? im only 21 and im pretty healthy. i wrk out regulary n i havnt been stressed or nuffin. has any body been thru nethin simular? if so please tell me.