I've certainly overdosed on adex and experienced the joys of too low e2. But it seems you have much less aromatase than for instance I have, since I would require way, way more adex on the dosages you have been running. Hence, my e2 has always quickly rebounded within a couple of days without any problems, and that may be why your body is slow to make new e2.
I've tried aromasin a little now, and since that is a suicide AI, I notice I get a much slower e2 recovery using that.
Adex is listed with a half life of 40-50 hours, and total elimination should be complete after 4.7 half lives, so 250 hours is the upper range estimate.