Pregnancy testing

Hi ladies... can any of you tell me if you’ve ever tested positive then got a negative pregnancy test? I took one last Wednesday; I received a very faint positive. I waited a day and tested again and the faint positive line became darker.... I tested on Friday (the day I was to get my period) and it was negative. 🤦🏻‍♀️ I decided to wait a couple more days and I tested this AM and received another positive... faint but noticeable that it was a positive. I am using first response pregnancy test. I’ve never used them before... I’ve always used the cheap target/Walmart brand and they worked great.

Has anyone ever experienced this? Thank you!