Multiple faint positive clear blue...

So AF is due in 3 days, the last day and half I've taken 3 clear blue tests and each one has come up with a faint line... Like the one below. I'm feel so reluctant to believe them as I know blue dye can be dodgy. But at the same time I feel like 3 I'm a row can't be a coincidence.

Has anyone else had this and gone on to be pregnant?

I have done a frer yesterday but it was my only one and with afternoon wee. I feel like there is a squinter but I'm not sure. I've put a pic up but it's hard to pick it up on camera. I will be testing again tomorrow.