I am sorry to hear of your broken hand. I think that it is crazy that you would allow that to hinder your advancement within the fraternity. In fact it makes no sense to me.
I am also extremely confused as to your statement "im an EA ...before proficiency for my FC" are you or are you not an EA (Entered Apprentice)? If you are ready to return your proficiency in FC (Fellow Craft) then you should by all rights be classified as such, not an EA.
If you want your Masters Degree bad enough, the broken hand will not cease your journey. Your Lodge should be able to prepare for any slight modifications of ritualistic ceremony so that you will not be hindered in your advancement.