Welcome to Healthcare Magic.
I shall explain the standard line of action in a case like yours.
If you are trying to conceive for 4 years & are unable to do so you should go to a fertility
clinic with your husband. They will check both of you & find out all the causes preventing you from carrying a pregnancy
for so long.
Your period problem & lack of ovulation may be just one of them. There could be other causes as well.
After full evaluation & listing all factors responsible for your sub-fertility as a couple, can a medicine be prescribed to you.
Taking any medicine especially Bromergon without an indication, without a prescription & just as your friend says so is a very DANGEROUS practice. I strongly recommend against it.
Wish you follow the correct path.
Best of luck.