Your mindset is not so good at the moment.
Stick to your original plan. (jump down to 25nl zoom at 200)
Here's an idea, when you start back at 25nl, start by playing a less volatile style, more tight, less variance. This is to accomplish two things:
1- regain confidence by winning any small amount you can
2- build a momentum
After you build momentum with a few small wins, you will become more confident and the momentum will continue, you'll move up to 50nl, keep winning, etc
Just book a few small wins at 25nl, your mindset will be much better.