1) How did all of you get through these moments without losing your cool and remain patient?
Patience and reading the lessons
2) How long after the beginning of counseling did you start seeing changes in your spouse?
He isn't in counseling so I can't give you an answer to that, but I've noticed a significant change since I've been using the tools described in the lessons.
3) How hard is it to forgive after the fact?
That depends on you. I am a forgiving person. I'm not going to forget, but I'll forgive. Forgetting keeps me in a position of extreme vulnerability. I'm not going to be a patsy, but I'll be forgiving.
4) Does she ever change after she is done with counseling; or will these actions continue to be an issue in the future?
That will depend on both of you. You have to accept her as she is and understand that she has an illness that she is not able to control easily. The uglies may rear their head from time to time, but may lessen in severity if you follow the tools and techniques to handle your end of the weirdness. She will have to work on herself, but there's nothing you can do to make her different... . she must want it.
In all, I've not been disappointed in the results from using the tools described in the lessons. Hopefully they will work for you as well. Keep posting and getting insight from the wonderful and very wise folks on this site.