I'm at 51 days today and for the last 20 days or so I feel like I did before nofap. All benefits I got around day 20 gone. I have few urges to relapse, but don't see a point in continuing.
Keep going brom this is a crucial point in your rebooting. You are passing a level. Do whatever you want but don't stop there. It might probably be a flatline. It happens to all of us. It is a normal state, it will pass for sure and when it'll get better, it is going to be really awsome. You need to be patient. Try to stay occupied as much as you can.
If you go back, you will just need to repeat the hard stuff all over again. You are moving out of insanity, through withdrawal, and toward a solid, healthy mental life. Don't give up now -- you are just beginning to make real progress!