3 months is usually the time span it takes for your body to adjust.
before i started taking birth control i was 98 lbs. in less than 2 weeks my weight shot all the way up to 115 lbs (alot considering my starting weight) it was alarming because i didn't know if it was going to stop or not
and that is a rather fast rate to be gaining weight.
eventually i stopped
gaining weight, but the excess didn't just fall off on its own. it took a bit of effort and i'm now around 102 after 3 years....
*as a side note i used to have a very flat stomach, and after taking birth control i have this bulge that wont go away. at one point i did get back down to my original weight, but the buldge was still there. however to me, the side effects were a worthy tradeoff because my horrible cramps are gone
