I also have pcos, and I still ended up pregnant with my husband. Im now 11 wks 6 days! So stay positive, just in case this time its a no, if you really want a child, keep trying.It will happen for you. Just try to take really good care of yourself like you're supposed to and you may be surprised :)
I also have PCOS. I had to take provera and clomid in order to get pregnant. As for your situation I would continue testing with first morning urine. And if not pregnant I'd get in to see your OB. PCOS suxks but there are a lot of things that can help aid you in getting pregnant.
I would wait another few days, and if not proper period then re take the pregnancy test with first morning urine.
Irregular bleeding and spotting is a common side effect of PCOS so it's 'normal' for that to happpen if you have a history of it. Mayb see your doctor for something to regulate you if it continues.