Hi doctor. I am a 23 year old female. I am currently on yaz. My last period was 2 weeks ago. It was very light, lasted only 2 days as opposed to the usual 4 days. Last week I started having lower abdominal cramping, breast pain, upper abdominal pain, nausea, tiredness and headaches every second day. I also am sensitive to strong smells.Please could you advise what could be the cause.