That is due to the fact that in the monthly hormone cycle estrogen is predominant in the first two weeks and progesterone in the second two weeks. Progesterone is nicknamed the pregnancy hormone because it is high to keep things in order for the development of the child. When progesterone suddenly drops each month that is what causes the uterus lining to flush out and give you menstruation.
Remember that there is gestational diabetes...that is because progesterone is active during the whole pregnancy and also the doctors want the baby to develop in normal blood sugar levels in the mother's body or else the baby will get fat as it's own body starts to handle the mother's glucose. That is why babies born to diabetic mothers can be quite large and fat. So during pregnancy of all mothers they check for any sign of high blood sugar and put the mother on insulin for the pregancy. When she is not pregancnt and not so large in body, the body can hadle the insulin levels needed on it's own, but perhaps some doctor will say otherwise and put them on a drug that contains a class of drug to stimulate insulin prodcution and that just causes weight gain in the long term, until the insulin resistance becomes so bad that....and the story goes on....
When I had my period, I had to adjust my insulin level each month...I went reading about this so long ago that I can't refer you to which doctor's book set me straight, but it was before the Internet was running for the general public.
It means you need more insulin during the 2 weeks after ovulation and before the menstruation. I bet you usually feel better in the first two weeks of each month and the pre menstrual time that all men like to blame for the reason they can't get along with their women...all the extra emotions, etc.in the time just before the menstruation...that is the progesterone hormone at work.
However, I don't recommend anyone take more insulin than they need to keep blood sugars in line with what they eat because if you gain weight that in itself would disturb anyone and promote depression.
Take it from me who is a person who has used about 15u TDD on average of insulin and I am totally dependent on insulin for 30 years.
I can tell that you have fallen into the clutches of not understanding diabetes. What you need are supplements and exercise only, plus a wise diet of proteins and vegetables.
There is so much more I could tell you from my 30 years of reading and being type 1 diabetic and 10 years of helping others.
If I asked God to strike down every doctor who has incorrectly advised people that they are diabetic, we would have close to no doctors.
One fellow I advised for 1.5 years lost over 20 lbs and his A1c dropped to just 1 point over the normal range. He gave up alcohol and eating candy....which is wise to begin with and should have been the first recommendation by the doctor.
While he was on metformin, I researched metformin for MANY hours. I am dead set against it for many reasons, but it depletes B12...and that causes depression as all doctors should know.
I suggest you get a B50 B vitamin complex and take it twice a day with meals and you will be a lot better. It will be a lifelong thing to take B vitamins...I do and that is one reason I take so little insulin..
Do not be concerned about the yellow urine that results....that is just the excess going down the toilet, which is why I feel B50 twice a day is more useful than B100 once a day.
I am sure you could learn how to stay NOT diabetic. First, do you have any gold coloured dental work? That is what gave me diabetes 30 years ago, but it took 17 years for me to find out and then it was already too late.