My period returned with my son at three months pp last time (I was exclusively pumping) and it was totally regular, so I don't have any expertise in irregular ones. I did however have multiple anxiety and asthma attacks while weaning at around 6 months. My thyroid also went extremely hypo around the same time, though I stopped pumping because my supply was decreasing, which could have been a result of the thyroid and not the other way around. So those hormone can certainly wreak havoc.

I'm 4.5 months pp with my daughter and my period hasn't shown yet, but my thyroid is extremely hyper at the moment, which could be causing the delay and not just the breastfeeding.

I stopped nursing at one year got my first period at 14 months pp and then got the second period a week later that lasted for 2 weeks. Definitely annoyingly irregular. I also switched BCP from the low hormone to regular, so that may have factored into it. The pp depression that you mention really hits home with me- I have been weeping, WEEPING!, for like 2 weeks now for no reason. I am still not back to my prepregnancy weight, which doesn't help. I have an appointment with my gyn in a week, so I will talk to her about all of this. Thank you for posting!

I'm nearly ten months pp and just finished my first period. I am still breastfeeding, but baby girl is also eating three meals a day. I knew it was coming as I had been craving nothing but chocolate for two weeks straight. I've eaten soooo much over the last three weeks that it's going to be quite a job to get back on track. I have 17lbs to lose by Christmas and I need to finish the 30 Day Shred which I started earlier this month. Completely lacking motivation right now and I'm not so happy being back on the monthly hormonal roller coaster even though it was gonna happen eventually. Humpf.

After previous pregnancies it has taken several months for my periods to even out, back to a near regular routine. However, if the irregular pattern goes on longer than six months I'd consider taking a mini pill for six months to help bring back regularity. Every two or three weeks is no fun. Your hormones must be all over the place right now.

With my first I was supplementing with formula, and my period returned at 3 months pp. This time my OB told me that mine would probably return at 3 months, which I thought was weird because I was EBFing. I EBF'd until 5.5 months when we started solids but continued BFing until a year. My period came back at 10 months pp. After I quit BFing it acted funny for a couple of months and seems to be getting back to the way it was. I'm glad because it's now coming every 4 weeks exactly, just like it used to, whereas for a couple of months it was closer to three weeks. I was not pleased!

As for hormones/sadness, I didn't get that, thankfully. I got sad when I thought about weaning, but once I did it I felt fine about it. I'm still super emotional about my kids, though, in a way that I never was before my first was born.

I'm 6 months pp and have been pumping exclusively. He never took to me, was a preemie baby and I just kinda got used to the pump. Now it's driving me nuts!!! But every time I think about weaning him off, I turn into a big sappy mess. SO...I've somehow managed to wean down from pumping 6-8 times a day to 3 or 4. He's content, boobs aren't and neither is my mental state. I'm grumpy almost all the time, edgy. My 3 year old's tantrums drive me insane more than they used to. The baby doesn't seem to upset me, unless he gets all pukey on me....3 times in an hour with 3 changes of clothes on me...oh my. Anyway. I started my periods at 3 months pp and haven't had one since. So I'm irregular. Not pregnant, we've checked. My appetite has come back in full force lately and I'm really craving some sweets. It's been horrible. I know I need to stop eating. I'm full but durn it tastes so good!! Maybe my husband and I need to stop cooking such good food. Yep. I may just go back through my old meals and see what I used to eat when I was losing my weight. Surely won't be what we've been eating lately. I've gotta get motivated again. Good luck to ya'll!

Vitex (chasteberry) is an excellent herb to regulate hormones and periods. It regulated me when peri-menopause started hitting and got my ovulation and periods back to a 28 day cycle, allowing me to get pregnant. It takes a few months though.