10dpo (or maybe 8dpo?) so confused

Jenna

My husband and I have been trying for our third for over a year now. I use this app and another app (based on bbt)- the other app says I’m currently 8dpo, while this app says I’m 10dpo. I tested first thing this morning and got what I thought was a faint line on a first response test. Naturally I’ve been obsessing all day and ran to target during my break from meetings and bought a clear blue. I don’t see anything on this one. Do you think the faint line this morning was real? I’m going to test tomorrow again, just my mind is a rollercoaster right now 🤞🤞