Hi Microbob, sorry to hear about you downswing. I experienced something similiar (at NL):
here
I don't know what works for you, but I switched to a different game (6-max limit) and started from scratch, relearing the nuances of the game and gaining confidence. You could probably do something similar at $25NL, if you have even a basic understanding of the game you can beat it. Your opponents are poor and you risk very little. If you're unconfortable playing with a full stack (which is understandable at first), just buy-in for 50BB and get all-in w/ overpairs, TPTK, sets and better. And stay at the table and play with your new big stack.
Good luck.