im on yaz also only it really helped me. but ive noticed that some months i wont get a period and other months its right before i start a new pack. now my doctor has me taking it for 3 straight months skipping the white pill and only having 4 a year. as long as you didnt skip any then its fine. if not then i suggest a pregnancy test. good luck!
good luck depression appetite birth control real reason pregnancy test headaches and nausea severe mood swings