I have for a long time suffered from scrupulosity.
Characteristic feelings for me when I “scruple” are fear and doubt. Doubts of my own reasoning, mostly. Not doubt of my faith. I ahve a very strong faith and it gives me a lot of comfort. But the scrupulosity has a way of putting fear into my head… like, for example, I don’ think something is/was a sin, or I don’t think something is an obligation, but then I think: What if I am wrong? What if exactly this time I am wrong, so why not better ask anyway? maybe it is a sin if I don’t ask because how can I just assume I am right, maybe I just want to make it easy for myself, maybe I am just selfish… OR I have a temptation or some bad thought, maybe an angry thought, and it goes very fast and suddenly I am not sure anymore: Did I maybe consciously want it after all? Probably not, but what if somehow I WANTED the thought after all? Did I hold on to it a LIIIIITLE bit too long? And if I don’t remember, am I obliged to go back over and over it again in order to find out what I felt?
OR the thing that somebody mentioned about the communion fast. Ohhh how many things I have before felt might break the fast. Maybe something flew into my mouth while I was walking, maybe a raindrop might break it, maybe I licked my lips and hadn’t washed my mouth properly after dirnking coffee… even now while I amw riting this I am worried, what if those DO break the fast and by writing this udner the heading of scrupulosity I might make somebody else think it does not break it and then it is my fault! (so, just to make this clear, I am not making a statement about whather or not these things would break the fast, I am just making a statement of the kind of doubts as scrupulous person might have).
OR for a long time I felt guilty about things I enjoyed, and would find a lot of reasons why they might be sins, like something in me feels guilty about enjoying something, being worried I might enjoy it too much, questioning myself “may it be a false God”… just some examples.