Tweak please?

Hubs and I are ttc for #2 and my period is 4 days late. I'm very regular (literally start on the same day every month). I tested before I missed my period and didn't see anything. Tested after I missed and still nothing. I feel like I can see a very very very faint line but I am scared my eyes are tricking me! I haven't been under much stress at all and all the symptoms are the exact same as my first pregnancy and not any period I've had ever.

Greatly appreciate the help!