When, relative to the time you got your shot, did you get a blood draw? Best to get the draw just before you inject.
Second, seven days is already a bit shaky of a dosage time for estradiol valerate. I do mine twice a week because I don't want the big dips. Reduce dosage, not frequency. By fourteen days, you have very, very little estrogen in your system, and then the big dose is a bit much in the other direction.