I took it several years ago. I only took it 2 cycles. It made me ovulate one month, but not the second. I quit taking it because of the headaches. I don't remember any other side effects.
My sister used Clomid to get pregnant with all 3 of her kids. It worked great for her, and she didn't have the bad headaches either.
When I finally got pregnant, it happened several years later with no drugs. I was completely surprised when it happened. I had not been obsessed with getting pregnant, but we had not used any protection for 5 years and had no luck. I had completely resigned myself to the fact that I would not be able to have children. That's when I got pregnant. There really is something to be said about relaxing and just letting nature take its course. You can't force it, no matter how hard you try!