D..
I think that lots of women have different periods after each child. It's like the body resets itself or something.
I would recommend that you go see your doctor and talk about the low sugar problem. You should also ask if you can get a check on your homoglobin too. I'm wondering if you might be anemic.
Might as well get all the info you can so that you know what to expect and how to deal with it.
Good luck!
Dawn