Re: Lack of progress?
It sounds like you are on a plateau; it is very common, and usually signifies an impending improvement/breakthrough. And about the only thing to do is keep slogging through it and not let it get to you. Bow in with a smile and no expectations and accept what happens. Maybe in your case, be willing to move slowly and not "go for throws" but for letting the feeling of good posture, breathing, and position be your focus.
Don't give up! It won't stay this way forever.