Take a deep breath and try to stay calm . . . afraid I know very little about PCOS but lots and lots about Type II Diabetes since I've been living with that little gem about 20 years now.
Do you have a family doctor? If so, I imagine the emergency room techs will be passing along the information about your visit. Calling him/her is a good place to start.
Either 316 or 360 is way too high for your blood sugar level. An acceptable fasting (nothing to eat within the past 4 to 6 hours) level is usually between 90 and 125. If you had just eaten a large, carbohydrate stuffed meal, like a big plate of pasta or lots of pizza, within an hour or so, although definitely not good, a level of over 300 might be expected.
BUT, stress can also cause some pretty high blood glucose readings, even for non-diabetics, and I would imagine you were pretty upset at the time the readings were taken, so, once again, try to to get too panic-stricken.
Usually Type II Diabetes is diagnosed by relatively simple blood tests so it won't be a terrible experience so definitely talk to your doctor as soon as possible to get those tests organized.
Metformin is a great medication and is the most often thing prescribed for either Type II or PCOS . . . but it can cause some stomach upset (most often diahhrea) when you first start taking it. Most people find the symptoms will settle down after the first couple of weeks.
In the meantime, you might want to look up the American Diabetes Association on the Internet and do a little research.
As mentioned before, stay as calm as possible and good luck to you.