wow, you really need to check your BP, that is most likely the cause if you already had high blood pressure, you might be in a really high danger zone, I would get it checked ASAP.
Too much T can kill the libido as well as too little T. Generally most younger guys get a stimulus from 500mg T while older guys systems tend to get more sensitive. At any rate my guess is your body needs to stay in a more physiologic range - in other words lower your dose of T. And the BP issue could also have an effect and this could be related to E levels even at that dose.