Hi, this is the first month that i am using OPK's, i am using the lullaby conception brand, i was just wondering if any of you know, my menstrual cycle has been around 38-39 days, so i started testing at 2pm every second day from day 14. do you think this is ok? or should i be testing every day? today i got a strong control line but a faint but visable test line, but wasn't as dark as control line, do you think i am still yet to ovulate or will ovulation maybe happen tomorrow or the next day? please help