Negative tests but positive blood test?

Krystin • Bentlee 07-27-20 💙 love my cranio warrior!! TTC #2

Is it possible?? I’m 10 days late. Negative red dye tests and two faint positive blue dye. I know the blue dyes are known for false positives. No sign of period or symptoms. Had pink wipe first in the morning a couple of days ago and red wipe the next morning. Nothing the rest of either day just in the mornings but nothing since then. I’m going tomorrow for a blood test.