Hi i am 33 and i have a 16 month old son. My husband i got pregnant the second month we tried with our son. Trying for #2 and its only bin 2 months no luck, so i purchased cb opk and first responce opk my cycles are regular at 28 days and as per ovulation tracker app today is my ovulation day with no positive on either opk although the first responce is darker then prev. Days. Just wondering is it possiable to not get a positive or how late could ovulation come. Such a newbie sorry any help would be appreciated.