I have always used the toilet more than most, especially through the night, but since got pregnant with my son 3 years ago the problem is getting worse. My gynecologist (whom I was seeing for fertility problems not this) suggested I must be urinating small amounts often and that I would need 'counciling' to train myself not to go as often. However, I have since recorded how much I am drinking and how much I am passing per day and I think the results are unusual. I am drinking 1.5 - 2.5 liters of fluid per day and am passing between 200 - 500ml MORE than I have had to drink that day, and going to the toilet 12-14 per day. Websites I have read suggest that you should use 1 liter of what you drink on hydrating your body, sweating and on bowl movements.
I have been to see my GP who did not seem interested. He said I didn't 'look dehydrated' and suggested it was just my body's way. Am I just being silly?

You may want to suggest Diabetes Insipidus. It is a form of diabetes wherein you drink a lot and urinate quite a bit more.

Are you always thursty?

I have been tested for that in the past, I've also been tested for water infections a million times, but yes I am. I can't go out shopping without taking or buying a drink where my husband thinks that is silly.

Now, I'm talking about Diabetes Insipidus, NOT Diabetes Mellitus. They are two different diseases. Do you know which one you were tested for?

Quote:

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Diabetes insipidus (DI) is a rare disease that causes frequent urination. The large volume of urine is diluted, mostly water. To make up for lost water, a person with DI may feel the need to drink large amounts and is likely to urinate frequently, even at night, which can disrupt sleep and, on occasion, cause bedwetting. Because of the excretion of abnormally large volumes of dilute urine,

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Found here... Diabetes Insipidus - National Kidney and Urologic Diseases Information Clearinghouse

I've got an appointment to test my liver and kidney function and sugar levels, would it show up on those?

You should have your ADH checked (Anti Diuretic Hormone).