after you had gyno before why did you stop taking the nolva? if you had it early in the cycle that would mean you are prone to it. I would jack up the nolva to .25ed or .5ed and nolva 40per day untill it settles down. If it just started the gyno reversal is going to be a little harsh.

Once you get it down keep taking the nolva at 10mg/day and arimdex at .25 eod or .5eod too keep it at bay for the rest of they cycle