Super Super faint!

Tiff • Baby number 2 is on the way.
2 separate tests done on the same day. Then late afternoon I did a digital test which said not pregnant. That was 2 days ago and I haven't tested since. Waiting a little longer to test again. Also, AF was meant to come on the 29th but I have weird brown spotting since. My boobs were also mega sore but today don't feel as bad. Am I too early to test
 positive on a digital? Anyone else has similar experience?