Cycle Discharge ?

So does vaginal discharge coincide with the menstrual cycle? If so, how? I wanted to use this app to track my discharge because I have an occasional feud with my SO because his anxiety causes him to believe that it is from me being attracted to/aroused by others, so that I can show for the fact that that is not the case whatsoever. Please help. I'm pretty positive that i have discharge on the days leading to my period, and a few days after. Otherwise I am dry unless I engaged in strenuous activity and got sweaty. Or if I am extremely stressed, I am not sure about that one but I swear it causes some.