You need legal representation. The courts will take mental health into account. You broke a court order - you will eventually have to face the consequences.

With suitable representation you will be able to get the most appropriate sentence, which should not involve custody in the general prison population, and in a sensible world not involve custody at all because you are clearly unable to understand the law and consequences in a way that people who do not have mental illness are expected to do, and it is therefore futile to punish you. Sorry to have to say that, but I think that is the way it is.

Happily Scottish law is generally more humane than English law. I hope it works out for you.