I went up probably a cup size from the herbs, then went down a little after I quit taking them. In other words, I started at 36B, went to up 38C, then back down a little to 36C. Keep in mind, though, I did gain a little weight (maybe 10 lbs?) while taking them. Saw palmetto (the main herb of the three) increases the appetite. In my case, though, it was a much needed weight gain. It also has estrogen-like properties, and from everything I've read, shouldn't be taken with birth control as it might affect the effectiveness of them. I'm not sure about the wild yam or the fenugreek, though, but I think that the same would hold true for them since they also affect hormones. I wasn't on the pill when I took them.
You're lucky the pill doesn't affect you badly. I'm sensitive to every medication under the sun (not just bc), what can I say, I'm a human guinea pig.
Even if the side effect is listed under 'rare' it'll probably happen to me. My chest did get bigger on Ovcon-35 (from a C to a D), though, but unfortunately, I suffered depression on it as well.
It sucked because that was the only bad side effect I had on that pill. Then I found out some time after going off of it that the pill depletes B vitamins, and that if I took a B complex vitamin at the time, I probably would have felt better. Of course, the doctors won't tell you this. They would rather just keep switching your pills around so that they can keep making money off you and get their kickbacks from the drug companies. I don't blame you for not wanting to try some of the new pills. I personally think the older ones are best. I've read some real horror stories about some of the new ones over on the Birth Control board. Even though I'm not on the pill anymore, I still lurk and post on it to help other women to hopefully not suffer the same fate I did on the pill. I was on various brands for a good 10 years.