I started birth control last July and since then I have been on t...

I started birth control last July and since then I have been on three different kinds of pills. I first was on Zovia. While on Zovia I would get my period every other week, and this went on for six months. Second I was on Karvia, and it made me depressed and increased the cramps to the point where I couldn't walk. My Dr. then switched me over to Ovcon 35 and I am just ending my second pack. I have had nothing but trouble with this Pill. I have had: sudden horrible headaches, a change of appetite, lack of energy, depression, bloating, stomach cramps, constipation, dizziness, loss of appitite- to the point where i couldnt tell if i was hungry or full, missed period, nausea, and I have gained weight. It got so bad that I freaked out thinking that I was possibly pregnant and I took a test only for it to be negative. (Thank God). Hopefully switching to Yasmin will be better for me.