thanks for writing to us,
The break through bleeding are common with loestrin an combination of ethinylestradiol
the irregularity in menstrual cycle is due to the hormonal imbalance due to the birth control pills,these are good in controlling pregnancy
,but chances of failures of 0.5 percent is also noted.
, breakthrough bleeding
are signs of hormonal imbalance and its completely normal upto 3months of starting the pills.
if you still worried about your status of getting pregnant, do an urine pregnancy test and confirm your status.
have good and healthy diet,drink plenty of water , have safe sex to avoid this kind of problems.