I'm not sure about interactions with Zoloft, but there may be some conflicts with the birth control. I think that it may lower the effectiveness of it a bit, but moreover there could be some slightly toxicity issues with mixing the two. Nothing too serious, but to be on the safe side, you may want to practice some "alternate methods" just in case. Sinner can elaborate a bit more on this one, and he may be in to do so.
<--- just for Bob.