skipping placebos

My doctor said it was ok to skip my placebo pills and only take them every three to six months. I should have started my placebo pills this week but instead I followed his directions and started a new pack. Now I am having light pink discharge that is increasingly less pink as the week progresses. Is this normal? Has anyone else experienced this? Should I be worried?  There should be no chance of pregnancy as I have not had sex with out a condom and none have broke as well as being on the pill.