Very faint line.

Kr

I took two pregnancy tests this morning. My AF is due today. I took the ones from Dollarama. My SO and I both noticed a very very faint line on both but I don’t know if I should trust it or get my hopes up. Could it be a false positive? It only has a 5 min window and we saw it right away. I will test again tomorrow but wondering if anyone else has experienced the same thing with dollar store tests? Thanks!