Thanks everyone. It really helped to read that others have been through similar things! I feel a bit less out of control now.
I looked through my calendar and my last period was on 6th Sept (longer than I thought), and today I went to the doctor.
The doctor said given my symptoms and time since last period, he is pretty confident that I am 6 weeks along, and possibly up to 8 weeks.
I did ask what other reasons there could be for a false positive, and he advised that 6 weeks is a pretty good mile stone. The chances of the cause being something sinister are so small that it's not worth thinking about. If it was cancer I wouldn't expect to have sore breasts, no period, nausea, and a positive test.
He spent the next half an hour educating my husband and I on prenatal care, and advising which doctors and hospitals, etc. Everything about his manner was very much that as far as he was concerned, we were going to have a baby in late June or early July.
I asked about the possibility of miscarriage, and that PCOS have much higher rates of it. He said he wouldn't call it dramatically higher, and that it can happen, but is much less likely given that I appear to be a minimum of 6 weeks as most miscarriages happen earlier than that.
It did make me feel a whole lot better, and while I will still be nervous until I get the all clear, I am no longer fretting about worse case scenarios so much.
My husband is getting quite excited, he told me he's going to be a great dad.
I feel kind of out of it, not as happy as expected I would be, but not dreading it either. I don't feel emotionally myself at the moment (and the nausea and fatigue doesn't help), so I am keeping that in consideration.
Tomorrow I will try and get either the scan or the bloodwork done.
I am trying to do it on the sly from work. The news will not be received well, so I am going to delay telling them until I know what to do.
Thanks so much for everyone's kind words and advice, it helped me get through a night of fretting much easier!