Can remember, please help

Victoria • TTC#1 RAINBOW BABY=) miscarriage around 6weeks June 2015. Struggled with ovarian cancer at age 17 only have one full left ovary and a small portion of my right ovary.
How long after a positive opk do women generally ovulate? I just want to make sure I'm timing everything right. And also I got a positive opk just now but I'm not producing any ewcm I've been pregnant before but can't remember if I produced any because I wasn't really "Trying" to get pregnant I was more so going with the flow thinking it wasn't even possible for me to get pregnant. I ran out of conceive plus so I don't have anything to use in place of my CM am I still just ask likely as someone who is producing it??