Is this a false positive on the Kruidvat test?

Just a quick question,

I've really had the feeling I'm pregnant for quite a while, so I bought some tests last week. Nothing. I also got my period every time, but for a lot less time than usual—normally seven days, now only 3.

I'd already done a few tests and they were negative.

Now I wanted to do one more tonight anyway.

Positive... I panicked since I know exactly when I last had sex, and it won't be four weeks. Yeah, if you've been together for 13 years and have four kids, there's not much time left for a romantic evening???? I was so startled.

An hour later I did another one and it was very faint. I'm not sure what to make of it.