Your work has been OK for eleven years and is stressing you out now? What has changed? It sounds so sudden and out of the blue. Have you had a full physical checkup? Certain conditions can, in their early stages, cause mood swings like this, auto-immune diseases, some neurological conditions, and so on. has your doctor ruled out anything like this? Do you have a racing pulse,have you lost weight, feel jangly and irritable? Thyroid hormone is another thing that can build up to a level that can cause a panic attack. If you have had all this ruled out, then it is a question of finding the right medication for you. Sera.