Why Are Periods Not Coming Even After Taking Bromocriptine ?

Hi, i am a 23 year old lady and have been ttc for five months now. I missed my period in may and took two hpt tests that both came back negative. Had an appointment with a gynae and he prescribed bromocriptine which i have been taking for two weeks now but still no signs of period. Today i took another hpt and the results were one bold line and another very faint one. My question is, could i be pregnant? Am 177cm tall and weigh 65kgs