What Is The Treatment For Depression?

Hi Dr, I m a 38-year-old female and have been suffering from depression and anxiety since I was a teenager but was only diagnosed 4 years ago. I was put on Wellbutrin 300mg and Lexamil 20mg, I was later taken off the Lexamil after a had a panic attack and took an overdose of the Wellbutrin and adcodol (has codeine and paracetamol). My Psychiatrist then put me on Epitec, urbanol and I continued with Wellburtin. I was pregnant last year and had to go off the meds, I was feeling fine during the course of the pregnancy. Unfortunately four months after giving birth, I started to feel severely depressed and had to go on the meds again, but on the lowest dosages, Wellbutrin 150 mg, Epitec 25 mg, Urbanol 5mg but twice a day for each. Three weeks ago I started to really feel depressed and had feelings of anxiety and two days ago I had a breakdown while driving to work and had to park in the middle of the highway. I just started crying and couldn t stop. What is the problem, do my medication dosages need to be increased or do I need to take different medication altogether? I was happy that I was doing well on the low dosages and was actually thinking I might go off the meds as I don t want to be dependent on them. Please help I feel so trapped!