Evap or chemical??

***UPDATE*** I hadn’t chemical pregnancy Started my period this morning(1/20/20)😭🤷🏽‍♀️

These look like either evaps or I’m having a chemical pregnancy. I think I had implantation 1/16 due to cramps and brown blood on the tissue. Missed period on the 17th. What do y’all think? Do these really look they getting darker because I don’t see it. I’m going to continue to test this week. I haven’t called the Dr yet because I’m waiting on a darker line. I’m so scared and confused.