Clear Blue Digital

Day 43 of my cycle. Typical is 36. Negative test on Saturday and Monday. FMU gave me a Pregnant 1-2 on a CB digi this morning. FREAKED OUT. Not planning on telling H until tonight, but now I'm worried about even that because I googled and it sounds like there are lots of false positives. WTH? I thought digitals were the set in stone, yep, it's real test. So - can I take a dye test tonight? Or will it prob not show up without FMU?