This dignosis you have mentioned as PCOD
is confirmed from your doctor side than the treament you are undergoing is not the exect which should be given in this condition.
Infertitlity in PCOD is mainly because of hormonal
disbalance and this can be treated with supplementation of hormones from outside. But before doing this other medication are used to increase the chences of ovulation depending upon the severity of the condition. Apart from that other general things like management of the weight and diet is also important in this condition.
I would suggest you to consult some infertility
expert regarding this condition and in the mean time try to reduce your weight.
Thanks and take care