Hi, According to the literature alcohol intake can lead to menstrual irregularity sometimes. Drinking alcohol can lead to increased estrogen and testosterone hormones which will affect the regular reproductive hormonal cycle and can lead to menstrual irregularity. The intermenstrual sporting you are having after drinking alcohol can be due to this. If it repeats in the future better to get evaluated once to confirm the cause, by clinical examination and ultrasound the exact cause of the problem can be identified and treatment can be taken to accordingly. By decreasing the frequency of intake and amount of the alcohol, menstrual irregularities can be counteracted. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Sree Gouri S. R., OBGYN