Learn English – Are guilt and remorse basically the same thing

Stress is often used to describe a mental state caused by excessive pressure of work. Distress is found in contexts in which people have been subject to traumatic experiences.

Remorse is deeper and stronger than regret. One sense of regret is

A feeling of sadness, repentance, or disappointment over something that has happened or been done.

You may have associated regret with Italian "rimorso" because a deed was done. But regret is not limited to the above sense; it can also be used to talk about deeds that weren't done, ie also has sense

A feeling of sadness, repentance, or disappointment over something that hasn't happened or hasn't been done.

Regret thus seems to correspond with your "rimpianto" in that, in your example, you focus on the deleterious consequences of an action (or inaction).

As well, regret may be used of acts (of commission or omission) performed by others.

Remorse addresses the speaker's moral sense of personal guilt. It is directed inward, a gnawing feeling of distress over one's own responsibility for one's own grave error—in many cases a sense of having sinned; while regret is directed outward—an unmoralized feeling of distress over the unhappy consequences of an act which may have been performed (or omitted) by anyone.

So remorse can be your rimorso if, in your example, you are using the same sense of "doing something wrong."