So confused please help 😩

Emily β€’ Mama to a baby girl πŸ‘§πŸΌβ€οΈ

So yesterday I was getting faint positives alllll day, I've just done 4 different tests (3 the same brand from yesterday - that came out negative today) and one came out positive - albeit it was faint - according to many sites I'd be about 4 weeks along (my AF is due tomorrow) is it worrying I don't have a darker line? When should I next test?