Best advice for anyone who has a suspicion that they may be diabetic, i.e showing the recognised symptoms is to visit a chemist who do free glucose tests. quite a few do, Lloyds do one and they will do a quick and simple finger prick test. if its high then make an appointment with the GP, if its normal then it could be something as simple as the weather dehydrating you, this happens a lot in winter, more than people realise, you drink more and go to the toilet more. alcohol, caffeine and sugar all dehydrate the body as well in people without diabetes so it may be nothing to worry about.
as for yeast infections, again a multitude of reasons can cause that.......
GP's are always overloaded at this time of the year so a 5 minute visit to the chemist will let you know if you need to see a GP or not.