Mental state after masturbating

Hi everybody,
I would like to understand if I'm the only one having this issue and how I can overcome it, it is about masturbation and a sort of self-punishing habit I'm inflicting for no apparent reason.
The problem is, once I've done it, I feel like I can't do anything else for the rest of the day, except for a few necessary activies like working or cooking.
It is not about physical fatigue: Some moment after I finish I enter in a mental state in which I cannot pursue any of my hobbies or favourite activities - for the simply reason that I have done something "dirty" (even if I know it's not) and that I must wait for another time, generally the next day to wash away this feeling.
This mental state is especially strong if I need to do something new (for example start watching a new TV series), and weak if I want to progress something I have already begun, although it still haunts me in some way.
I perfectly know that masturbating is normal and that basically almost everyone does it, the simple act of writing this makes me feel ashamed of this issue but also relieves me at the same time. It is a mental fixation I'm trying to debunk and stop it for good.
So I want ask you what you do after masturbating, not necessarily one moment after but like during the whole day. It may help me to gain some ideas and get your thinking about this, although I expect that you do basically whatever you want.
I've been also wondering what is the name of this particular disorder/fixation, I had a look online and found other issues like feeling ashamed of masturbating, but it's not 100% my case actually, although it sounds like a different variation of it.

That's it, thank you for your comprehension and apologize for any mispelling