Ovulation testing? Help?

Al
I thought maybe I was pregnant... I usually have my period for 5 or more days... But my last period the 1st day I spotted very little, 2nd day regular, 3rd day regular, and 4th day spotting very little. I took a pregnancy test before I started testing for ovulation and it was negative. Maybe I tested too soon? I have been checking for ovulation with clearblue easy read for 7 days now and I didn't ovulate yet. I also have PCOS. Should I buy a new kit and continue the ovulation checking? Should I wait till after the next period to check for ovulation? Take a pregnancy test? Could I be pregnant?  Any comments or suggestions will help.