Pregnancy test error?

Court • Wife. Momma to one boy, 4/10/17 ❤️ & one girl, 2/12/21 💜.
I took this test first thing this morning and it appeared the be negative so I threw it away. At lunch I pulled it back out and it has this line on it. Do you think it's an error because it wasn't flat in the trash or could it be a positive?