First response and clear blue

So my period comes in 2 days and I ovulated on May 22nd. May 31st I took a FR test and it had a very faint line to when you can’t see it but you know something is there. June 1st I took another FR test and there was a very faint line with pink. Today I took a FR test and 6days sooner clear blue digital test. The FR line got a noticeable pink but still faint. The clear said not pregnant. I’m confused because people recommend FR and say that they are accurate but when I take clear blue it says not pregnant. Has anyone had false positive on FR test?