CYCLE BUDDIES😑

Savanah
Hello. My name is Savanah. I'm 21 years young. Me and my boyfriend are TTC my #2, his #1. We have been trying for 1 month. 
I do not use OPKs, we just have intercourse every night or every other night. I typically have 21 day cycles. I was expecting AF Feb. 13th. I am currently 3 days late. 
We have taken multiple pregnancy tests, but every single one has a faint line (evap line). We are gonna buy enough tests to last a month so we can test every morning until we have a forsure postitive. I just feel as if I am getting my hopes up and every evap lines brings me and my boyfriend down :(Â