Nolva/ralox is going to be a better bet than aromasin. Aromasin just lowers estro and i doubt yours is that far out of range. However my guess is as good as yours until you get bloodwork.
My bet is that your test levels have dropped and your estro stayed the same. Ive noticed my nipples bother me when i have my test dose too low. For me, estro and test need to rise and fall together.
fat gain can also contribute to gyno