Cycle all screwed up

I'm on the pill, which is supposed to regulate my cycle, no? This current period is now on its thirtieth day. 3-0.

And I've been wondering for weeks now if I really do have PCOS. The tests said no, but the doc didn't administer the tests on the proper day in my cycle. She said, "Normally we'd have to put you on the pill to regulate your cycle on then do the blood tests on a specific day, but I'm so sure you have PCOS that I don't think we have to bother with that." Except that the resulting tests didn't show PCOS. So now I'm still wondering.

I tried to call and ask, but this particular doctor, though seemingly wonderful, has a nurse who is very difficult to get past.