There is no need for increased alarm. You have been on this pill for 5 months now, and by now your periods should have stabilized to coincide with the cycle of the packet. I suggest you see your doctor to choose a pill that better controls your cycle, at the same time a pregnancy
screen can be done to put your mind at rest. Also have your routine PAP test done if it has not been done in the last 2 years. It is not good to partake in excessive alcohol intake while on the pill as this can influence the efficacy .