Junel

So I just started taking junel a week and a half ago. This is The first birth control I've been on in almost 2 years. I'm not hard core preventing pregnancy but not trying either so we didn't take the Drs advise to use a back up method this first pack. I don't know if it's the hormones I'm not use to or if there is a chance I'm pregnant but my nipples hurt so bad. Has anyone else experienced this starting a new birth control. I've been on numerous forms of birth control in the past and I've never had a side effect like this.