My doctor just ordered a ton of tests

Kayyyy
My doctor just ordered a ton of tests to be done because she says I have Classic pcos symptoms . I haven't had a period since November and that period was 10  days long and heavy and in December 2014 I had a miscarriage so she wants to explore that as a possibility can anyone give me any insight on exactly what pcos is ? And if you have been able to have a child ?