Hi,
As your body reacts and adjusts to the increase and initial fluctuations in hormone levels that take place when you start the pill again after a break, it is not uncommon to experience any of the following side effects like
nausea, headache, breast tenderness,
bloating, weight changes, mood or emotional fluctuations,
bleeding between periods etc due to suddenly high levels of
estrogen. Once your body is used to the birth control pill and your hormone levels have regulated, usually after about three months, these side effects should subside.
Intermittent spotting or a little irregular bleeding are very common in women who are starting the birth control pill after a break. It will take a few months for your period to develop a pattern through, so there is no need to worry if you are spotting in between for the first few months. You need to contact your doctor about irregular bleeding is if it is excessive or especially abnormal.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Zubayer Alam, General And Family Physician