I started taking Yaz birthcontrol a little over a year ago. I went from 113 lbs to 125 lbs in that year. Last week I had my yearly pap and a refill on my BC. I was out of my presciption for a month while I waited to go to the doctor. I started taking it again with out waiting on my period. So, I haven't had one this month yet. I weighed my self a couple days ago.. 130. Then today 136??? What could be causing this? Any ideas?