I know exactly how you feel. I had one situation that set me off & then everything else started to set me off. Therapy does help. You may be repressing things that need to be dealt with; possibly conserning DUG. When I'm not dealing with something emotional every little thing starts to get to me & pretty soon I meltdown. I starting seeing a therapist around april. I see her every 2 weeks. I won't lie it's not easy; she makes me examine things I'd rather not think about, but she's trying to help me deal with things & then discard. It wouldn't hurt to check it out.
Also talk to your family doctor he should be able to give you the name of a therapist and possibly something to help in the meantime. My doctor gave me a small dose of Xanax, I take half a pill when i begin to feel "overwhelmed".
I also wanted to add that there is nothing wrong with you. Everyone processes things differently & you are not abnormal or crazy. You might also be a Highly Sensitive Personality (it's not what it sounds like). When my therapist suggested this I did lots of research on it & found it describes me to a T. Check out this website it might help. P.S. my dog also has HSP, which I find a little funny. I hope you find the answers you're looking for.
The Highly Sensitive Person