help!! bby charting

Bianca? • 23 years old glow and fertailaid helped me conceive my first love👶💕
I have been using the opk kit from clearblue and I am now in cycle day 18 so far with 0 ? I'm getting bummed I kinda feel as of I have ovulated or am at the moment. because I have slight mild cramping here n there. I also have been charting my bbt and I'm just so confused!