I have been taking Lutera for about 2 and a half weeks, and I have never been on birth control before this. I have not had any side effects until today - my breast are swollen, I have cramps, and a headache - and light bleeding (like the ammount I would have on my last day of my period). But my last pill is on Sunday - are these side effects, or am I starting my period, because isnt that not possible? I have taken it everyday on time. Whats going on?