No bleeding after chemical... pregnant again?

Need some help confused so on January 12th i got a bunch of positive hcg test but they faded so i figured i was having another chemical. I had light pink spotting for one day then nothing so was very confused. I have been test hcg all negatives and now i got faint line on hcg. I'm like 99% sure its just faulty indent or evap but just confused as to why there is a faint line again. Hoping the line shows in pictures thank you.