I Want To Get Pregnent, But I Have Pcod Problem,

I want to get pregnent, but i have pcod problem, weight problem and irregular period problem. i did every thing to reduce weight bt it con't reduce. my doctor suggest me to take some tables like c2n2, kglow folic acid tablets etc.... last 4months i got regular period by taking tablets now my period is missed up to 50th day but in home prgncy test is negative my doctor suggest me to take gestin tab twice a day for 5 days. What is the use of taking this tablet? It make me to get period? or it make my prgnt test as positive?