The guys above are right. You should never go that long on steroids because recovery is going to be extremely difficult. Think about it: if you have to come off two times the amount of time that you are on, that means it's going to take you almost a year to recover
I would have definitely assumed you crashed your estrogen but if you're saying you didn't and you still have anxiety, it could be that you're just not a good reactor to it or could be dirty gear. Who knows.