Good luck with your block!

It isn't weird at all that you would have better days after something like that. While it sucks (and believe me I can relate)...you don't always realize what sort of stress it can put you through while you are in it. The stress becomes the "norm" and you don't realize how it is affecting you. Stress is a trigger for RSD so it makes sense that you would have some good days once that weight is taken off your shoulders.

Stay focused on your health and getting better. Once you get there you can go find a new job that will be better for you anyway. Take care.