Is it possible that the headaches are related to your cycle, but not necessarily the blood sugar issue? Lots of people get migraines with their cycles, and those definately can be exacerbated by tiredness, manifest as sinus-type pressure, and come with nausea.
Anecdotally, my own morning sickness was definately not linked to blood sugar. I threw up constantly, for about seven months, no matter what my sugar levels. But I would be interested to see an article or similar linking the two, if you can find it.
I had been thinking that - that it was somehow connected to my use of the pill. So last month I stopped it - and this month the nausea was worse than ever. I've been having headaches for a year or two with my period, usually on the first day, but the past few months it's been more random, sometimes twice a period, and including nausea, so I'm a bit confused.
Would a migraine just go away on its own? After 12 hours or so?
Off Wikepedia:
Causes
There is insufficient evidence to pin down a single (or multiple) cause, but the leading theories include:
An increase in the circulating level of the hormone estrogen. Estrogen levels may increase by up to a hundredfold during pregnancy.
Low blood sugar during pregnancy.
An increase in progesterone relaxes the muscles in the uterus, which prevents early childbirth, but may also relax the stomach and intestines, leading to excess stomach acids.
An increase in human chorionic gonadotropin.
An increase in sensitivity to odors.
Eating vegetables. Vegetables produce a small amount of toxins to deter insect infestation and while these toxins are normally harmless to humans, they are potentially dangerous to embryos. One theory suggests that becoming nauseated during pregnancy is an evolutionary measure to prevent a mother from eating vegetables, thereby protecting the embryo from the toxins. Other studies, however, have linked consumption of fruits and vegetables to higher birth weights, which tend to mean healthier babies.
Intake of alcohol, sugar, oils and meat, which have been postulated to cause a natural trigger of morning sickness in the body as a way of discouraging ingestion of less healthy foods.[1]