I Have Irregular Periods. My Doctor Suggested Me To Take

i have irregular periods. my doctor suggested me to take mephrate tablet for 3 days and discontinue. this helps me get my period on the 4th or 5th day. I am 2 weeks late and have taken mephrate for 3 days. its now a week and i havent got my period. i am sexually active is it possible that i am pregnant. i havent tested yet.