My sister experienced a really difficult time after she gave birth to her first child. About 8 months after her child was born, she started experiencing intense emotion swings. This happened at the same time when she started having her period again. She was still breast feeding at that time. On certain days, she would be extremely irritable, constantly feeling stressed out, even having paranoia sometimes. She also had trouble sleeping on some days. On certain days, she would feel depressed, for hours she would just sit there and complain. These symptoms seem to follow a menstrual cycle. They lasted for about three months. It seems that she might be having a hormonal imbalance. Do other new moms have similar experiences? Do they have some solutions?