SteinerofThule, when you do get the resources I hope you will consider MoxieDoxie's suggestion to see a neurologist. Actually, the first place to start would be with a primary care doctor. If you described your symptoms, just as you've described them here, stating that you don't remember experiencing any major trauma, but that these episodes seem to just come out of nowhere, it might be very helpful to you.

What you're describing can be caused by a neurological disorder that can be treated.

There's no reason at all why a person can't have both psychological problems and neurological problems at the same time. The neurological problems might even be easier to treat.

It's just something to think about. There are neurological problems that manifest in ways very similar to what you're describing. The seem to come from nowhere and there is often stomach upheaval. The thinking/feeling sensations are often described as emotional storms that don't seem to have any particular trigger. They just arrive without much warning. And they feel awful. Does that sound like what you're experiencing?

It would be important to at least rule it out before accepting a psychiatric diagnosis.