OP someone needs to explain this to you so here is the difference between AI's (which isn't an estrogen inhibitor like others have said here) And SERMS (selective estrogen receptor modulators)

Testosterone is a very fragile hormone and is easily converted to estrogen via something called the aromatase enzyme. AI stands for Aromatase inhibitor, meaning it inhibits the converstion by inhibiting the enzyme.

SERMs on the other hand still allow for the conversion of estrogen but it prevents it from binding to estrogen receptors.

AI's won't help increase natural testosterone levels and often when you stop taking them you experience estrogen rebound meaning your estrogen levels increase trying to level out.

SERMS are what you use for PCT (nolva, clomid)

Please do some research before you cycle consider cycling again!