Anyone ever done this and it be ok?

So yesterday I took 4 different brand of tests, at 11 dpo, everything had been negative til yesterday and suddenly my OPKs were blazing positive so I took a pregnancy test again and had very faint positives on all brands including FReR and another red dye test... today my FrEr this morning is nearly negative I can see the faintest line, and my others have t darkened at all but OPKs still very dark... I’m going to buy more today but ha this happened to anyone and it got darker later on?