Pregnancy tests

I’m not sure why I do this to myself but I had bought this brand and since I spent the money I decided to use it. Over the last two days I’ve taken 4 of these and all faint positives. I took two digitals and they say not pregnant and I took two pink dye family dollar ones and negatives. Is this brand good at early detection? I’ve been tracking af for three years and last month I was 4 days late and now this month I’m on day 4 being late so I’m either late or this is first day of missed period. I don’t track ovulation. I’m never late besides last month so idk what my body is doing