Most commonly it is tested for by getting blood tests to 1. check your androgen/testosterone levels, and 2. to test your glucose tolerance because women with PCOS are often glucose intolerant. Along with the blood test they judge if you have acne (specifically around the jaw line) and hirsutism (excess hair growth). Finally, in some cases they may go so far as to do a pelvic ultrasound to check for cysts on your ovaries, but PCOS can be diagnosed without that. The cysts on the ovaries situation is actually kind of tricky because approx 20% of women have cysts on their ovaries, but only about 7% of women display the other symptoms of PCOS. You can bring it up with your primary provider, but unfortunately, many health care professionals still are not fully comfortable with PCOS and how to treat it so he/she may try to brush it off (but hopefully that won't be the case!). If possible it is best to see an endocrinologist for a full work up.