I know im stupid but please give advice

I have 2 under 2, Im 5 weeks pp. 2 weeks ago my bf and i had sex, he pulled out but i know that doesnt mean anything. It was stupid but it was the first time him and i actually wanted each other since ive been pregnant so we got a little love struck. Tonight i took this. Its SUPER faint, even my bf saw it and is a little easier to see in person. Im gonna test again in a few days with first morning urine. But what im wondering is, at 5 weeks pp could that super faint line be from my previous pregnancy? Its only been 5 weeks so how long does it take for pregnancy hormones to leave your body?

*ill also add that we are financially able to afford the baby if it comes to that, so yes we would be able to take care of it just fine.