I can't say wether I had problems with fertility or not.
My periods were irregular and painful. I was careful not to get pregnant using calendar method (8 days before and after menstruation).
Even though several times I failed to follow the system right on the days where conception was highly possible, I never got pregnant.
As I started clensing and eating healthy, my periods slowly became regular and normal.
I remained beeing "careful", but this time I got pregnant in spite of the calendar. I was very surprised, to say the least, when I got my pregnancy test positive.