Any thoughts??

so I had a period tracking app before I got Glow. I got Glow when I went off the pill which has been over 2 months now. glow says my period should have came Tuesday and my other app says it should come next week. I haven't gotten it yet but now last night and this morning I just have like when I wipe it looks like a light brown blood but not like alot. should I test or should I wait and see if I get it next week??