Hello. Based on your symptoms, you may need to consider a few things in addition to a possible hormone imbalance. Four and a half months is a significant duration now. And if these bouts of crying are affecting your life in a significant way, you could consider the possibility of a Depressive Disorder. And the depression can come from hormonal imbalance including thyroid hormones, stress, significant life events or idiopathic (without an identifiable cause). You may also have to check whether this is a seasonal occurrence (Seasonal Affective Disorder). Low functioning thyroid gland can lead to a condition called Hypothyroidism, which presents as sadness, lethargy, weight gain, etc. With Estrogen increase, we usually expect some physical changes in addition to the mood changes. Physical changes include bloating, headaches (common), swelling of hands and feet, etc. Over all, if sadness of mood is not your primary symptoms, you may be able to say that there could be a physical reason for your symptoms. You may have to visit your GP and get some blood work done. Hope this helps. Abhijeet Deshmukh, MD