ok so i have a very irregular period, so i have no clue when im going to ovulate but i bought an opk today to help me and there is a visible line but its not as dark as the control line. anyways my cycles range anywhere from 23 days to 31 days .... today i am on CD 18 (period on oct. 28th) .... i was wondering if since there is a visible line does that mean i am getting closer to ovulation ?? so should i test tomorrow morning and see if it says anything different?? thanks for your help in advance in new to all this stuff !!