Re: Looking for help on choosing a good birth control.
I also read that low-dose pills, or pills with less than 35mcg of estrogen are generally not recommended for women over 155lbs, because of decreased effectiveness...however, it also has to do with being overweight, because it has to do with your metabolism -- so if you are a reasonably healthy weight for your height, it may be alright. You should discuss it with your doctor.
Also, no hormonal birth control method is guarunteed not to make you gain weight. Just as many people lose weight as those who gain weight on any given pill. And plenty of people stay the same. The only birth control method that has been *proven* to cause weight gain is the Depo shot. The Depo shot is also connected to loss of bone density with extended use, and is generally considered to be a risky choice for long-term use.
An IUD may also be a good choice. A non-hormonal, copper IUD would likely not cause any weight gain because there would be no hormones... I think that weight gain is often linked to the estrogen in a pill (though not always), so the hormonal IUD may be another option to talk to your doctor about.
There are plenty of options for you, and unfortunately, sometimes it takes some trial and error to find a pill that is right for you. I had to try several pills before I found one that I really liked.
Best of luck!