Until you know what's going on, i wouldn't make any harsh life changes. I found with myself that when I was going through a mood swing I would get a headache and I knew that it was coming.

I would keep track of your moods and what precipitates them, if anything. A lot of times it's spontaneous but stress is a huge factor.

You will inevitably need to see a pdoc if you need treatment. I understand your concerns about mental health issues and the system. I went un-diagnosed for a long time and left a trail of misery behind me.

Good luck and I hope you find what you need