Im so confused

Aylin

Since last month i started using this wondfo pregnancy tests 10 miu, and i never saw evap lines and So on 6dpo

which was on jan 22 i got a fvt but i honestly didnt see it on the first couple of min, i left it there and hours after i notice it was there,ive been testing for the past few days and seems to be getting lighter, so don’t know what to think.

My period is due on the 30th

Could they just be evap lines ? Any similar experiences??