New to glow

Hi all I'm new to glow, been using the app for about a month now. I have a 15 month old and we're trying for number 2! This is the first month I've been somewhat serious about tracking my ovulation. I've gone by what glow has told me for my fertile days and also I've been checking my cm. I haven't gone as far as taking ovulation tests. We've been "trying" somewhat not really since February and still nothing :( I'm really hoping since I've tried hard to track that this will be the month! This is my chart for the month, I've started to have some cramping today and I'm not sure if this is just signs of AF coming. Some insight would be really nice, I'm just so stressed with the whole process! ​I'm not sure exactly when I ovulated and when I should take a pregnancy test... Ik I won't be able to hold out until the 17th