Hoping for a bfp...

AF is due today and no signs of it yet .. But 3days back I had brown sticky discharge for a couple of days , I thought maybe AF was about to start early (and was a little upset )  and then Nothing .. if my period doesn't show up today .. I am planning to test tmrw .. should I ?? Or should I wait for further symptoms  ?? Am so tired of multiple bfn the past couple years of ttc.. so confused ..!! Need lots of prayers and hope .. !!!