you should never double your dose it will not help. The fact that you doubled your dose twice is probably the reason for the light period. If you did not miss any doses you should not have anything to worry about. But if you miss a dose and try doubling it to keep from becoming pregnant that does not work, all that will do is mess with your system. So if you missed a dose, Yes you could be pregnant.

YEP U CAN BE ESPECIALLY IF HE EJACULATED IN U..BUT IF UR ON THE PILL AND U NEVER MISSED A DAY THEN U R FINE! BUT JUST INCASE U MISSED A DAY, U DEFINITALLY WANNA GO GET CHECKED, CASUE HIM EJACULATING IN U........ WOW THATS A DEFINATE YES IF U SKIPPED A PILL U COULD B WAIT TO C IF U MISS UR NEXT PERIOD HUN, WHENEVER U HAVE SEX.ESPECIALLY UNPROTECTED, THERES A CHANCE OF PREGNANCY! WELL ACTUALLY THESE R ALL THE SYMPTOMS: * missed period * proof (positive test) * sensitivity to scents * repulsed by or craving of certain foods * basal temperature remains high * tender or swollen breasts * abdominal cramping (feels like menstrual cramps) * hormonal skin changes (acne, dryness, etc.) * feeling like your abdomen is bloated * more frequent urination * uncommonly fatigues/exhausted * nausea * dizziness * morning sickness (which can actually happen any time of day or night) * moodiness/irritabliity * heartburn * constipation * low back pain * implantation bleeding BUT LIKE PEOPLE HAVE TOLD YOU, EVERYONE IS DIFFERENT, BUT ONE THING THAT REMAINS THE SAME WITH ALMOST ALL WOMEN, IS, THE FIRST SIGN OF PREGNANCY IS A MISSED PERIOD....I DONT MEAN IT WAS SUPPOSED TO COME TODAY AND COMES TOMORROW, IF IT U R LATE AND IT STILL HASNT CAME....BY THE TIME ITS BEEN 2 MONTHS AND IT STILL HASNT RETURNED, THATS A MISSED PERIOD, BY THEN (AFTER 2 MONTHS WITH NO PERIOD) U GO TO THE DOCS AND TAKE A $50 BLOOD TEST, HOME TEST DONT WORK SO DONT WASTE YOUR TIME AND MONEY ON THOSE.. BUT YES THE FIRST SIGN OF PREGNANCY IS A MISSED PERIOD.... THEN IF ITS BEEN GONE FOR ABOUT 2 MONTHS, IF UR ACTUALLY PREGO THEN THE SYMPTOMS WILL KICK IN, THEN GET CHECKED! I HOPE THIS HELPED