Advice please

Sophie.

Someone told me that you she she used a opk to test to see if she is pregnant before she missed her period and even tho she did a pregnancy test the day the af was meant to show and she was I am just wot if you can use then as I have just tried and there is a faint line on there

I am due at in 6 days I have also had pinky blood in my underwear for the last two days