Opk question please help..

Amanda • Mother of 2 boys pregnant with baby #3 found out on Mother`s Day due 1-17-2015
I just started taking clearblue digital opks in feb I got a + opk on feb 23rd then started my period on March 12th after my period ended on March 18th I started opks again with clearblue digital on March 19th so I wouldn't miss my surge got a + opk on March 21st but glow has my days just starting yesterday so I kept testing and today on clearblue I got a circle which means no surge but I started taking another one also and it looks like it's a + opk today it was as dark yesterday please help I have been trying for 4years now also have PCOS which doesn't help...