Somehow BNB seems to make the faint lines disappear!
It has only been two days and it was really hard to tell if there were lines on the initial tests you posted... If it's more obvious today than it was two days ago, even though it's still really faint, I wouldn't count on not being pregnant. If you caught HCG super low two days ago, it would still be very low today, especially if it isn't doubling quickly.