Evap line?????

How can I tell if I have an evap line? I bought cheap $ store tests to test out my ovidrel shot. I noticed a line there. It's not dark but def not lighter than the other.

I'm 12 dp the shot (250) and 10-11 dpo.  

I'm not sure if this is still in my system or it's an evap or the start of a BFP?????


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