I started taking this medication at the end of October for birth...

I started taking this medication at the end of October for birth control because I thought it couldn't hurt to be taking something just in case. Immediately I began noticing changes in my mood. I was always short fused, had little patience with people, was easily frustrated and got emotional over the smallest things.I was sick to my stomach and had a hard time going to sleep. I stopped taking the pill after I completed all the white pills. I never took the brown pills because I had had it with the extreme mood swings and I figured I would start my period anyways. It has been almost three weeks and I have not gotten my period! I am seriously beginning to worry. Has anyone else been in my situation and stopped taking the medicine without getting their periods?