Meant to be 5 weeks today ? Not sure now..

Laura

I'm really confused ,my tests last week were positive and one digital reading 1-2 weeks . I tested this morning again and it said 'not pregnant ' am now waiting for the worst 😔had a tinge of brown on paper yesterday when wiped but that's it . Has anyone had this and still been pregnant or looking like miscarriage ? Don't know what to think . Had a chemical last month so disappointing. Any thoughts ?