Before you start any E control (prescribed or not), you need to have the proper labs done to establish where you are and so that you can follow your progress and dial in the proper dose. It's difficult to do.
You need to get the Estradiol Sensitive (LC/MS/MS) test. LabCorp offers the best version of this. You can pick it up for around $50 at
https://www.discountedlabs.com/.
Only after that test shows you are high, should you consider starting anastrozole (or some other form of E control). Most guys overdo E control and end up worse than they started.
I'm also wondering why you think your E might be the problem if you are not taking exogenous T?