BC side effects

Seleena
I started a BC a little over 3 months ago. Nothing really changed besides my period being a lot lighter which is fine and I know that can happen with BC. I just got my period this week but these last two weeks before it I became very very emotional. I'm not one to cry about just anything. It has to be something major for me to cry about but I was crying almost everyday prior to my period. This has never happened to me before. Usually I get the regular PMS but this time all I did was cry. And cry about things that I would make up in my head from over thinking. Any suggestions as to what I can do? Any nurses on here? I'm pretty sure its a side effect from my BC. Its affecting my daily routine as well as my relationship.