If you do ejaculate, try to do some stretching right after, as the penis is more mallable.
Or if you feel like you can still continue with the jelqs, why not.
Wet and firm, that could had been the thing, but also your mental state matters a lot.
If you can, try to avoid ejaculating while jelqing but it isn't the end of the world if it happens every now and then.
I am personally in favor of clearing the tubes on a steady basis.
Nofap as a practise is alright if there's contact with a partner to keep your tubes clear, from my point of view anyway.
"All" things in moderation.