Need help and advice - frequent nightfalls

Hey guys, I hope all are good.
so there was something which I wanted to ask.
I have been trying to do no fap from 6 months.
But my longest streak was 29 days . Since I decided to do no fap I am experiencing nightfall very frequently. When I relapsed after 29 days streak the nightfall stopped for like 3 weeks but it started again . It is happening like in 2-3 days . It is around 2-3 times a week sometimes 4. I do exercise , meditation also I have tried Ashwini mudra yogasana . I can not understand what the problem is.
If anyone has gone throught the same problem or someone has remedies please suggest.
It will be really helpful.
Thank you