Next time take an Aromatase inhibitor (AI) during cycle as well as post cycle therapy (pct). Aromasin is the favored pct Aromatase inhibitor (AI), not arimidex. Here's how I would personally pct if i was taking this cycle....
12.5mg/Ed Aromasin *
40/40/20/20/20 Nolvadex **
* Start at 12.5mg/Ed and get blood work to see where your estrogen levels stand, adjust dose if needed
** Wk 1-2: 40mg/Ed, Wk 3-5: 20mg/Ed
Do more research man. I've personally posted this exact same information about 20times in the past week, so there are plenty of threads on this board alone that can educate you on damn near everything you need to know about cycle,oct,pct, you name it.