Help please?

April
I had some (what I thought was) implantation bleeding a while ago, am 3 days pre AF, and have morning nausea, am tired, and sore breasts. Tested per the apps instructions and I just can't tell if there's a faint line there. Even if it's a BFN, please give me your opinions. I'm 34 and ttc my last little one. Been trying for 3 months so far.