Thanks for writing back.
That is useful information to know that you had some "hypomanic episodes" as a result of the medications. Of course, you've shared this with your psychiatrist/GP, I hope.
It is possible that you may have Bipolar Disorder or Bipolar II... this can only be confirmed with a LMHP working directly with you.
Your specific question: "Could my physical and sexually abusive childhood be the underlined reason for my depression?" It is entirely possible that the abuse you suffered in childhood contributed mightily to your depression. I believe it is unlikely that it *caused* you to have Bipolar Disorder (I or II), but may have exacerbated underlying symptoms that might have remained dormant had you experienced a more typical, stable home environment.
If your question is whether or not you should get into therapy, the answer is ABSOLUTELY. Why?
Research has consistently demonstrated that treatment plus medication is more effective than medication alone or treatment alone for depression. Further research has shown that Cognitive Behavioral Therapy (CBT) is the most effective form of psychological treatment/intervention - particularly in dealing with mood and/or anxiety disorders (like depression).
A licensed psychologist/psychotherapist with specific training in CBT modalities would be able to address your concerns. I would encourage you to find a licensed mental health professional with whom to work, employing CBT. Be sure when you speak to a possible licensed mental health professional that s/he employs CBT techniques - not just "influences from CBT" or "an eclectic approach."
Again, the mantra of years of research says: medication or treatment alone is not as effective as both working in tandem. Some research has also indicated that insight-oriented talk therapy is counter-productive with some forms of mood and/or anxiety disturbance... it actually exacerbates the condition(s) [This is especially true with OCD]. So, seek out a CBT therapist who will provide targeted, efficient, and effective therapy - not someone who signs you as a "lifer." If you're going to a therapist for years, something about the therapy isn't working.
Your psychiatrist *may* know of a CBT licensed mental health professional. Please make certain, however, that they employ CBT practices.
If $$ is a super-big issue, you might want to consider contacting your local Community Mental Health Center. These tend to offer free or greatly reduced cost mental health services, including therapy and/or med management, depending upon your ability to pay.
Thanks. I hope you're well and that this was helpful.
* FEEDBACK ENCOURAGED. Please contact me prior to leaving negative feedback so that we can resolve the matter. I am eager to work with all JA clients to provide them with useful/helpful answers. Thanks again.