When would you test with inconsistent periods?

Casey

My period isn’t due until the 11th according to this app but my period is very inconsistent anywhere from 26-40 days I am pretty sure I ovulated the 23rd of December based on my symptoms and I had my last period December 9th. Aside from cramps and nausea I don’t have much symptoms I know I should wait but also I know I suck at waiting😂 when is the absolute earliest you’d even attempt to test? (We weren’t supposed to try until this month but may have not used anything two days before I think I ovulated) I know the odds of me being pregnant aren’t very high at this point.