period weird because birth control?

Liz

okay so my boyfriend is coming home from the army in a few weeks so my mom put me on birth control. I was supposed to take it the third day of my period. Which was yesterday. But my period came a few days early which is no big deal I guess.. so I had to take it early. Since I’m only on my third day it really shouldn’t be lightening up. I just took the pill last night around 6. Would it already be effecting my period??