The fact that E2 is suppressing your T levels, means that it is actively binding to your Estrogen receptors and exerting its estrogenic effects. Which leads me to believe that your e2 receptors are at least not damaged when it comes to T suppression
You can. spironolactone is an AA on top of being a diuretic. Most take Bica because it is a pure AA, and to be fair, it is more potent than spironolactone (albeit expensive)