Rika,
In addition to what Shel and Madhu said, you can try changing your hair partition. Like if you take center partition now, try to change it to the right side first (may be for few months) and then to the left side. I have very broad forehead too. But mine is like that almost from birth and as I started aging, it is becoming worse. My solution to the problem is to cover it up with side swept bangs. I have long bangs (fringe on my forehead). Now noone can even tell that my forehead is so big. So you can try that and see if you like it. If you don't, then you can let it grow.
By following the suggestions provided by our other ILites, you will see improvements. My suggestion is only for the interim.

Regards,
Shanti.