Depression may be a realistic possibility. Another consideration is bipolar disorder. You detailed the significant depression that you feel during the mood swings but you did not describe how you feel in the absence of depression. What is it like when you’re not depressed? Are you relatively happy?
Bipolar disorder is characterized by episodes of depression and mania. Mania symptoms include euphoria, increased energy, heightened sex drive and impulsivity. Many people fail to report symptoms of mania because they don’t believe it’s abnormal. Individuals who experience mania describe this state of mind as feeling very good. Mania may feel good but it’s unhealthy. Extremes in mood are a sign of emotional instability and possibly a mood disorder.
Your mood swings are interfering with your life to a significant degree. Untreated depression and bipolar disorder both have serious consequences.
The best way to approach this situation is to be evaluated by a mental health professional. They may be able to identify what, if any, disorder you have.
With regard to bipolar disorder, it is particularly important to be correctly diagnosed. Bipolar disorder is often misdiagnosed as depression. Misdiagnosis has consequences. The main consequence is receiving the wrong treatment. A specific concern is being prescribed the incorrect medication. Some antidepressant medications can induce mania among those at risk for bipolar disorder. You should be evaluated for both depression and bipolar disorder.
I would recommend psychotherapy and perhaps medication. These treatments could help you deal with mood swings. Therapy could help you to build healthier interpersonal relationships and skills.
I’m sorry that you have faced roadblocks in your efforts to receive treatment. Fortunately, as an adult you have the choice and opportunity to enter treatment, even if other people don’t agree. You are free to make your own decisions. You recognize that something is wrong and it is interfering with your happiness. This is proof that treatment is necessary. Here is a website that may help you find a therapist in your community.
I wish you well. Thank you for your question.