Diagnostic question

I have not been diagnosed with PCOS but I am really starting to wonder if I have it based on symptoms.   How were you diagnosed?  Did you ask your doc to run tests or did s/he so it on their own?  What symptoms did you have?  I have super short cycles (don't ovulate) and am on my third round of clomid (had to up the dosage each time and am on 3 pills a day). I also have other symptoms like thinning hair, weight gain (although not excessive) in my waist,  bad acne before period, oil skin/scalp, and a few others.  Any feedback about your experience will be helpful so I can figure out if I'm over reacting or if I have a legit concern.