Evap line or early pregnancy ?

Last month i posted a pic of brownish colored discharge/blood which ppl We’re saying it looks like the start of my period which never came on. Now I’ve been having very bad heartburn for the last 3 nights and my stomach has been upset kinda feel like a virus since last Tuesday. Well yesterday i took a test to rule out pregnancy and this is what i got. Any input my cycles are very irregular i may see it 3 times a year 🥴