TTC questions !!!!

Kari
I have been TTC for quite a few months now and this is getting so stressful and I'm getting very discouraged. This app, however, does help with my ovulation and keeping track of it. So next Saturday my ovulation percentage is 33% and that is my highest day. Should I have sex that Saturday to TTC or the night before, or so many days in advance ? I just feel like nothing is working.