I think this is your answer right here. The nolva is filling your receptor sites and the aromasin is killing whatever is left. Go read @physioLojik’s post For All You AI Preachers. Tons of good info. If you’re not aware, physioLojik is a trained Endo/bodybuilder/steroid user. In fact, you should read pretty much everything he’s written.
Edit: You should also stop guessing and get your E2 levels checked.