I'm confused....

Last week I took two test. One equate brand and one walmart .88 cent one. Both were clearly negative. No line whatsoever even after the test completely dried. A week later I took the same brand test. Both showed faint positives. I took like six more .88 cent test and all six showed faint lines. My period is about four days out. Is it possible this is a legit pregnancy? It's just weird how I didn't get a line at all on the very first two and a week later all the lines have been veryyyyy faint. I plan to test today with a FRER. But I'm so scared it'll be negative.