Could I have polycystic ovary syndrome?

OK, so I'm not really long past puberty, I'm only 21, but in the last couple of years I've had a couple of problems with different things and I'm not sure about whether to see my doctor or not.

I've been getting a bit of acne, not little spots all over my face, just big ones, normally on my neck and chin, painful ones that don't form a head and just leak oily stuff. I tend to get these coming up to my period and this didn't happen when I was in my teens. I shower and wash my face every day and I don't wear make up very often.

I've heard a lot of women get hairier with PCOS and this hasn't happened to me. I've always have quite dark eyebrows and stuff though and I've had to get my eyebrows and upper lip waxed since I was 12.

This is more recent, and I hate to be a bit graphic, but suddenly it's like my periods want to kill me. I had one a couple of months ago that was a couple of weeks late and just came very strong and suddenly and painfully and buggered up my life for a few days. They've all been a bit irregular for me, normally 30 days on the dot but now ranging between 25 and 35 days, and they're all different in heaviness, painfulness etc.

I've also had dull pains in my lower stomach, particularly in my hips, between periods for a few months now and some spotting in between my periods, normally when I'm getting these pains.

I don't want people making guesses or googling or just saying 'see your doctor'. I want people who have or know people with this condition to tell me if this is what it sounds like. Thanks.