faint positives?

I keep getting faint positives on the "easy at home" internet strips. I am 13dpo and on 10dpo I took a Walmart cheapie and a frer and there was nothing there. I'm still getting the same faint lines on the internet strips. I am so confused. Are they bad tests? Has this ever happened to anyone? The lines are always there within 5 mins. The bottom one I just took this morning so it's still wet. Thanks for any help!! I was trying to hold out taking another frer until I had a for sure line cuz I don't want to waste the money on those tests. I had an <a href="https://glowing.com/glow-fertility-program">IUI</a> and this would be my rainbow baby. I am beyond confused.