Hi, I have taken CCQ 50 for 5 days as advised by my doctor now, I am late for my periods according to the 26 days cycle I usually have and my pregnancy test was negative yesterday and today(8 oct 2014) is my exact date for my periods . please let me know by these tablets will I be late for my periods. What exactly are these tablets used for???? Is is possible for me to know whether I am pregnant or not,I have the following symptoms: Sore breast nipples Cramps in abdomen, legs and back ache ( pricking like sensation on both sides of the abdomen) Constipation White Vaginal discharge Kindly let me know are these symptoms of me being pregnant or just my regular periods???