Sorry I was gonna post earlier when you posted but had technical issues. I agree with the above post, once diagnosed you can work towards some treatments. But I see your scared to go to psychologist. I was too at first but then I decided to go and it was a big help. To have someone to talk to about anything and they wont judge you and sometimes they can offer some good ideas to help. But what I was gonna ask you is do you have a regular family doctor? It might be easier to talk to them and let them know whats gonna on with you. Its a good place to start too so that you can rule out any physical issues. Sometimes other things can cause mood swings. I personally have had to deal with thyroid and hormonal issues and boy can those cause you to change moods alot too.

You have found a great place here for support and info. Good luck to you.