Please help!!! Faint positive at 4 DPO?!?

Kasie • Hubby and I are 27. We have an amazing 4 year old boy and beautiful 5 month old twins.💜💙💜
Is it even possible? I took a blue dye this morning and a FRER this afternoon. The blue dye was an evap but the FRER has SUUUUUPER light color. Is it even possible to get a faint positive at 4dpo? I'm super impatient :(