hi this could be down to the change over of bc pills if the hormones had changed it could all be from this as hormones can really upset our lives. but if your really worried do go see you doctor and get a pregnancy test done but wait for the week after your next missed period or light period women can have very light 3 day periods through there pregnancy's. hope this helps you. good luck
how to tell if you pregnant? . i have started talking a new generic birth control pill and the week before my sugar pill week and getting me period i had abnormal bleeding where it was clear bloody (like urine) not very think and bloody like if i were to miss pills and take them to catch up and spot. it lasted the spotting occasionally for a couple days especially during intercourse. the week of my period i did not get any of the pms symptoms i normally get. i bleed very little and when i lie on my belly it hurts a lot