Fluoxymesteron is not known for giving every user gyno. For the most part it does not gave any estrogenic activity but what you are experiencing is known as
Receptor crossover.
A cross over is when a steroid hormone acts at a receptor other then its "native" receptor or for better terms "the receptor it normally binds too"...
In your case this The Receptor crossover Has resulted in the Agonism (activation) Of (Progesteron receptors) which is the common cross receptor cross over for drugs like Anadrol,tbol and halotestin,
So what you need is a light ai something like arimadex and a some dostinex.
I hope this helps bro.