My daughter is now 12 weeks old so I'm now starting to catch up on my sleep however I still have periods of feeling really low. I'm realy happy and have nothing to worry about yet I often feel depressed. It seems to come over me like a wave, I'll cry for a bit and then feel better. I'm not sure whether it will pass or if I need to speak to a doctor. I don't get it every day but it does happen a few times in a week.