Not sure if it’s a dye run?

Ok so I am 2-3 days late today but I have had irregular periods lately so I did not think much about it. I slept terrible last night and woke up nauseous this morning so I decided to test. This is the cheap Walmart one so I really can’t tell if it’s a true positive or if it’s a dye run. We only had sex once during my ovulation time so I’m really not sure. Please help.