As my monthly cycles were all over the place i had to do something and i felt whatever was wrong with me, going on the pill would only mask what was wrong, rather than fix it. I did try 3 various forms of the pill and each had very bad side effects for me and i've never been back on the pill since.
I found a naturopath who made up a herbal liquid tonic which i took day and night. It helped greatly in making my cycles regular, but every time i tried to go off it my cycles would begin messing up again, so i stayed on it and began looking at what else could be the cause.
After i had a hormone saliva test it all became clear. Basically you give a saliva sample at various times of the day and it is a much better way of getting a clear picture of what is going on with your hormones. Years ago i did blood tests for my hormones and they always came back saying all was fine. I did the saliva test earlier this year and my testosterone is a little high, but my estrogen is double what it ought to have been, something called E3 was low as well as my DHEA-S which are the cortisol levels for my adrenal function. (can't recall is E3 was progesterone as he highlighted low progesterone on my paperwork - will have to look that one up - too many things to look up

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My doctor gave me lists of symptoms and for excess testosterone it said you could have any of these symptoms: Acne, deepening voice, irritability/moodiness, loss of scalp hair, male pattern hair growth, PCOS, hypoglycaemia, ovarian cysts, insomnia.
I'm still in the process of treating all my issues. I have been on meds for i think 7 weeks now. If you have thyroid problems you can also have hormone imbalance issues and they now believe this is what my hormone problem is a result of. The thyroid has a very important job and if it cant perform it's job then a heap of other things don't function correctly.
I had an external and internal ultrasound and i don't have any problems with my uterus or ovaries or anything else and they say everything is looking perfect. So that rules out any internal issues and as i said, the only link they can find is the thyroid related one.
I'm now glad the pill gave me all those side effects each time. If the pill had worked, i would have stayed on it and would possibly never have found out what the real cause of my messed up cycles was, especially as my cycles used to be perfect.
The problem with BV is that nobody really knows why that happens. Different doctors give different reasons and some doctors have no idea at all. I thought it was only sexually active women who were suffering with it, but on the Womens health section of the board there were a few ladies who were not sexually active and had problems with it. I'm beginning to wonder that it could really be linked to a hormonal imbalance and when you look at it, way too many females have a hormonal imbalance these days.
You are too young to be having all these issues, but at least you are attempting to do something about them sooner than later. How do they treat PCOS these days? I hope you get some answers soon.