Opk...confused...HELP

Jamie
I know you wonderful ladies are probably tired of seeing my confusion already...but I had a positive opk on October 16...I'm running over a week late for af...all hpts have been negitive and I went to test today but accidentally grabbed an opk...and it looks near positive??? I know you only o once a cycle so now I'm truely dumbfounded...anyone have any idea what is going on? Anyone ever have the same thing happen? If so what did it end up being? I tried to call the doctor but I never got an answer. Please let me know possibilities! Thanks!!!